I have upgraded to Fedora 20 on 2 of my machines, 1 is a KDE Desktop and the other GNOME 3.
Both upgrades were pretty painless and smooth.
Simply switch Repo and do a Repo Sync, if you added any repo that does not have Fedora 20 branch you need to remove it first.
One strange bug is the dependency on autocorr-en.
When it is installed it will refuse to download the Fedora 20 Repo.
The workaround is to uninstall libreoffice first and reinstall it after you upgraded.

1. Fedora 20 fixes the strange KDE bootup hangs encountered in Fedora 19.
2. Fedora 20 default font makes the text rendered on Desktop smooth
3. Fedora 20 improved gnome 3 makes it bearable. There are USABLE extensions for application menu unlike Microsofts half baked attempt at adding a more user friendly Start Menu
4. GNOME 3 is more simplified yet it does not reach the point of hampering functionality. Of course comparing to KDE, KDE offers a lot more flexibility.
5. Nothing bad can be said of KDE as it is the same.

In systems configured with BTRFS, there are issue where the write back occurs for such a long duration where it actually hangs the system until the writeback completes.

Can not Download on Google Play Store Android, And How To Overcome It - Meet again with my friend, sorry infrequently updated blog yes, again there are lots of busy activities outside of the city, right straight to the point.


We already know that Google Play Store as a mini market where its Android download all kinds of apps and Android games are legitimate and legal. If we have Android gadgets no longer browsing here and there to search for the application you want because with Google Play Store that is already on your Android phone, you simply just type the keyword you want to search and a list of applications associated with the keyword will be right out.

But in terms of the ease of course his name is definitely not a human creation is perfect and elect one or two constraints. Android and we too are not spared from these constraints, one of which is the Facility Android Google Play Store which sometimes can not be made to download, or the download fails, and how to resolve the issue?


The problem in some cases, sometimes we experience difficulties when downloading an application or games via Google Play Store. Some of the people do not want to run the download process, this is often the case that I have, other than that there is the time to download the sudden application always exit / exit by itself, there is the time you finish downloading but does not want to install the application, and others.

And how do I fix this? Below Ive summarized a miraculous way to overcome this, please read carefully!




1. Reset the settings of your Internet profile
How to Solve Can not Download on Google Android Play Store 1 - Who would have thought if you get an error while downloading at Play Store is only because you are wrong in setting up the internet. Either PORT number is wrong or his proxy is empty.
On the other hand it also you do not get internet access when using applications like Opera Mini or WhatsApp.

2. Clear data cache your Google Play Store
How to Solve Can not Download on Google Android Play Store 2 - This is useful for removing garbage data accumulates and remove settings-settings that could be the cause of the error. The trick on Android 2.3.x open the Settings menu, select Application then Manage Application, select All. Search Google Play Store your applications there after it opened and select Clear Data and Clear Cache. While in Android 4.xx open the Settings menu, select Application, slide to right until you find the All tab. Do as the steps above.

3. Install the latest version of Google Play Store (can download here)
How to Solve Can not Download on Google Android Store Play 3 - Cause the download failed at Play Store could be because Google Play Store your already expired / old. Please download the latest Google Play Store is now present its 4th version. Please download at the following link, Google Play Store v4.0.2.7.

4. Factory Reset
How to Solve Can not Download on Google Android Play Store - Perform a Factory Reset or a factory data reset to open Phone app, and press the button * 2767 * 3866 # This way you can erase all data.

5. Re flash ROM Android
How to Solve Can not Download on Google Android Store Play 5 - Maybe this is the only way if the problem is not solved. Re flash your android ROM. It could be the default system applications Google (besides Play Store) is missing from your mobile phone.


How to Cope with Not Enough Can Download on Google Android Play Store this time, for more or less please comment below! Hopefully Helpful: Thank you ...!

Want to blog but lazy to type too long? Tumblr is the most fitting applications. Updates can be done at any time, simply by uploading an image, quote, link, video or audio clips - and add a few comments if you wish.

You can also follow other Tumblr users (who can follow you, too), commenting on their posts, and even share their updates with your own followers. So Tumblr blogging platform beyond a social network.

How do I? Its easy, just 3 steps with this:

1. Adjusting and Customizing Tumblr

Once you sign up for Tumblr, choose a name for your blog, which will be the URL for that too. It will look like www.anything.tumblr.com.

Now you are ready to make adjustments to your new blog. Click on the name of your blog at the top of Tumblr, and then click "customize theme." You can change the name of the blog here, add a description, and choose a new layout. Maybe you want to make it look more like a blog "professional" meant to post again, text-based, or may choose a theme designed for blogs with pictures only. (Some themes are free, others can cost from $ 9 to $ 49.)

2. Post to Tumblr

Tumblr allows users to update their blog using one of the seven types of posts, text, photo, quote, link, chat, audio or video. Each option will automatically format posts, so you do not need to know any code to make the post look good.

Text: Attach a brief announcements about upcoming events.
Photo: Post pictures of fashion inspiration or a delicious meal.
Quote: Sharing something inspirational, intelligent or meaningful - or just something you hear.
Link: Did you find something really funny on the web? Tumblr Share it with other readers.
Chat: Copy and paste the funny conversation of email or instant messaging with this feature (and permission friend).
Audio: Share your favorite songs on Tumblr so that your followers can enjoy the song too.
Video: Do ??you record something cool with your camera? Share it here

To post on Tumblr, just click the icon of the type of media you want to share, upload and fill in all fields, such as photo captions. Do not forget to mark the post with relevant terms that other people on Tumblr.

3. So follower

If you post content that is interesting - especially with the relevant tag - other people will find you and start your own Tumblr follower. There is an email notification that a new follower. Want to follow other Tumblr users? Simply click the Follow button on their profile.

LG TVs are very popular on the market, it has released so many popular LED TVs, Smart TVs, Ultra HD 4K TVs, OLED TVs, Plasma TVs, etc. there are many users have bought more than one LG TV, have you also bought one? Are you facing the same trouble in bringing MOV to LG Smart TV as the above user met? In this article we will help you to solve MOV to LG Smart TV playback issue, and then you can play MOV on LG LED/Smart/4K TV via USB smoothly.

"What video formats does an LG Smart TV support? I want to play mov movies on LG Smart TV through USB Flash Drive, but it doesn’t work, who can tell me what video format can play on LG Smart TV? If I plan to convert MOV video to LG Smart TV, what should I do?" 

• Read How to Choose the Right Smart TV | New BD/DVD release | VOB to Smart TV | Best Deals about Smart TV

As we know, LG Smart TVs doesnt support MOV format. To play MOV files on LG TV, you need to convert MOV to a LG Smart TV supported file format: MP4. After connect USB hard drive using the USB port, you can convert the MOV video to (H.264, AAC) MP4. Get a LG Smart TV Video Converter is your best choice to stream video to LG Smart TV on computer.
  
Here, you can turn to Pavtube Video Converter Ultimate. This fantastic software will give you great support in converting MOV to LG Smart TV friendly video like MP4 so that you can play them without incompatible issue. Besides MOV, this video converter is capable of convert AVI, VOB, TiVo, FLV, MTS as well as MOV to LG TV friendly file formats like .divx, .mp4 without quality loss. If you are a Mac user, iMedia Converter for Mac is a helpful app to encode videos for further usage via Mac OS X El Capitan. Download the software and we will share a quick solution with you. 

Free Download and trail: 

          

Other Download:

- Pavtube old official address: http://www.pavtube.cn/blu-ray-video-converter-ultimate/
- Cnet Download: http://download.cnet.com/Pavtube-Video-Converter-Ultimate/3000-2194_4-75938564.html

How to Convert MOV to LG Smart TV With Best Video Settings

Step 1. Start MOV to LG TV Converter and drag the MOV files to the software interface. Or you can click Add button to import the video. You can add several videos for converting at one time as this video converter supports batch conversion. 



Step 2: Choose TV optimized output file format. 

Go to “Format” bar, from its drop-down select, choose TV optimized file format to output according to your LG Smart TV brands, for example, if you own a LG Smart TV, you can select “TVs” > “LG TV(*mp4)” as your desired output file format. 



Step 3: Click the Settings icon to adjust video and audio parameters on the Profile Setting as you need to get the best quality video. 

Note: As we know, LG Smart TV can support 4K Videos now, you can use this great tool to upscale to 4K resolution. Just Click “Settings” icon on the main interface to open “Profile Settings” window, enter “3840*2160” in “Size(pix)” brackets, so that you will be able to upscale your SD or HD content to 4K resolution content for LG Smart TV. 

 

Step 4: Start MOV to LG Smart TV conversion process. 

Simply click the "Convert" button to start converting and everything else will be automated. If you have added quite a bunch of video files, it would take some time to convert. In such case, you can click Option and tick the box “Shut down the computer after conversion”. 

Youre done. Now your MOV files will be converted into MP4 files ready to be transferred to LG Smart TV easily. Start to view your MOV files on LG Smart TV with great enjoyment. 

Good News! To thanks for your continuous support, Pavtube Official Website and Pavtube Facebook are now Weekly Promotion with fantastic 50% off discounts and giveaway. Pay less to get powerful Blu-ray/DVD/Video Converter to build your own home media center from LG Smart TVs!

Read More:

• Convert Sony HDR-TD30V 3D video to SBS MP4/MKV
• Convert H.265/HEVC to PS4 for Samsung TV via Mac El Capitan
• Watch iTunes Movies on Sony XBR 4K Ultra HD TV via USB
• Play MKV/MP4/AVI movies on Vizio 50" - 60" Smart TV via USB
• Rip 2D/3D Blu-ray Movies to FLV format for Share

Pic-28(a)

If you have a habit of clearing history of safari from History menu in just one click but all of a sudden you can not find the clear history option in the history menu of Safari on mac.Follow the below mentioned step to fix this issue.

Step 1. You should first check if the Private browsing is enabled Private Browsing. Private Browsing keep Safari from saving your browsing history.So uncheck the Private Browsing from the Safari menu.

Pic-28(b)

When you uncheck the Private Browsing option it will ask for the confirmation so click on OK to turn it off.

Pic-28(c)

Step 2. Click on the Safari menu and select Preferences and then under preferences click on the general tab then under general change the value for Remove history items to Manually as shown in the picture- 28(d) below.

Pic-28(d)

Restart the Mac and then check Safari , now you should see clear history under history menu of Safari.

Tips: Sometimes resetting the safari also fixes these small issues so you could also try resetting the safari directly.

Sometimes the Empty Cache option is disappeared from the Safari or you can not see the develop menu in the Safari menu bar.So here is the step to bring the Develop menu back in safari.

Pic-28(e)

Display the Develop Menu In Safari

• Launch Safari, located at /Applications/Safari.
• Open Safari’s Preferences by selecting ‘Safari, Preferences’ from the menu.
• Click the ‘Advanced’ tab labeled.
• Place a check mark next to ‘Show Develop menu in menu bar.’

Pic-28(f)

The Develop menu will appear between the Bookmarks and Window menu items. The Develop menu is particularly handy for web developers, but casual users may also find the first two items extremely helpful in their daily browsing. The ‘Open Page With’ menu item lets you select any installed browser to reopen an open web page from within Safari. The ‘User Agent’ menu item lets you see how an open web page looks in a variety of Mac and Windows browsers and versions.

This is all-in-one guide to let you know the Comparison about 2016 best Kindle tablets and Our Verdict & Recommendations and Top Blu-ray Ripper for Kindle devices. Enjoy! 

Why Buy a Kindle? 

The top performers in our review are the Amazon Kindle HDX 8.9, the Gold Award winner; the Amazon Fire HD 10, the Silver Award winner; and Amazon Fire HD 6, the Bronze Award winner. Here’s more on choosing a Kindle to meet your needs, along with detail on how we arrived at our ranking of the top devices.

Kindles, Tablets and eReaders  

If you are frequently on the go, mobile computing has its advantages. For instance, full-size laptops have bulk and require packing accessories like power adapters. On the other hand, tablets and eReaders are versatile with lengthy battery life ratings and portable designs that can easily fit into a backpack. 

The Amazon Kindle lineup is split into eReader and tablet product families. Each new Kindle type offers the functionality you expect to find in a traditional eReader or tablet. Kindles on Amazon’s eReader lineup serve solely as a reading companion and have compact dimensions. By comparison, those in the Kindle Fire series have features commonly found on tablets like games and high-resolution displays. 

For users interested in tablets that run on different platforms, our tablet reviews highlight products like the Samsung Galaxy Tab series and Apple iPad. In addition, kids tablets operate similarly to standard tablets or eReaders but feature user interfaces and parental security options designed for families. 

One of the distinguishing features of the devices in the Kindle series is their connection to Amazons content system. The company offers a variety of secondary services, including movie and TV streaming and book lending. If you already use Amazon’s services, Kindles are optimized to easily integrate into your life.

Best Kindles: What We Tested, What We Found  

For our evaluation, we focused on Kindle models from Amazons Kindle eReader and Fire tablet families. As with our standard tablets website, we used a combination of hands-on and benchmark testing to evaluate performance. Our ratings mirror the primary concerns of an average Kindle user. Considerations like build quality, display integrity and battery life were heavily weighted in our rating. Build quality was determined by hands-on testing and takes into consideration the tablets case material and firmness. Battery life expectations vary between eReaders and tablets, but generally, you want respective battery lifespans of around two weeks and more than six hours. 

Through our testing, we came to several conclusions that are important to consider as you decide on a Kindle. The difference in features between the standard Kindle and Kindle Fire lineups is one of the biggest issues. Kindles are good eReaders, but they lack the horsepower needed for multimedia tasks like playing movies and music. Most eReaders have low-powered basic processors that extend battery life, but they have similarly modest performance ceilings. 

Screen quality is similarly important, considering how vital the screen is for both tablets and eReaders. eReaders dont necessarily need stellar screens, since they are only used for reading. The top-end Kindle Voyage has a modest 1448 x 1072 resolution, which can adequately handle simple black and white text. In contrast, tablets benefit from high-resolution screens of at least 1280 x 800. These displays are comparable to home televisions and optimized for video and multimedia content. Lower-resolution tablet and eReader screens suffer from problems like poor text and image quality. 

Top Ten Reviews seeks, whenever possible, to evaluate all products and services in hands-on tests that simulate as closely as possible the experiences of a typical consumer. Our testing used both manufacturer-provided review units and purchased retail units. The manufacturer had no input or influence over our test methodology nor was the methodology provided to it in more detail than is available through reading our reviews. Results of our evaluations were not provided to the company in advance of publication.

What Else Is Important When Selecting An Amazon Kindle?  

Amazons Kindle series has similarities and differences when compared to traditional tablets and eReaders by other manufacturers. Before you make a purchase, consider the following:  

Comparing Kindles: Reader or Tablet 

As with any gadget, your needs determine which Kindle version works best for you. Standard Kindles are exceptionally good single-task eReader devices. Because theyre optimized for reading, they have screens built for text and lengthy multiday battery life ratings. Amazons Fire tablets are built to be versatile, with high-resolution displays that can handle reading, as well as gaming and movie playing. 

Best Kids Kindles: Family-Friendly Options 

Amazons Kindle for kids offers different levels of monitoring for families. All of the Kindles feature basic softwareparental controls for making purchases and web browsing security, which make them safe for you and your child. Amazons Fire Kids Edition covers similar ground. The device has family browsing security options, a bundled case and kid-friendly content. As a starting tablet for young children, the Fire is versatile. 

Learn>>Difference between Kindle Fire HDX and Kindle Fire HD. 

Sharing With Others: Content and Platform Limits 

Most homes have gadgets from different manufacturers, but if youre a fan of purchasing content like movies, songs or eBooks, this comes with unique hurdles. Purchased content is typically compatible with a specific platform and cant be played on competing hardware. For instance, an Apple-purchased movie wont play on an Amazon device. 

If you own Amazon hardware or subscribe to Amazon services already, Kindles have their upsides. You dont have to deal with issues like login passwords and incompatibilities. Still, consider how important your existing multimedia library is to you.

Best Kindle Comparison: Our Verdict & Recommendations 

Top Kindles combine Amazons strong software options with exceptional build quality. Despite its relative age, the Kindle Fire HDX 8.9 maintains its high ranking thanks to its stellar build quality. Its high-resolution display is a strong point for the tablet, making it well-suited for gaming, reading and videos. Likewise, the HD 10 benefits from updated Amazon software, smooth performance and respectable build quality. Finally, the Fire HD 6 is a solid entry-point into tablets, thanks to an accessible price point and strong Amazon foundation. 

Along with our top choices, additional standouts include the Amazon Kindle and Voyage. Both eReaders feature stellar battery ratings and specifications meant for voracious readers. 

Source: http://best-kindle-comparison-review.toptenreviews.com/

Best Kindle Blu-ray Ripper Software Recommendations

Have you ever thinking about playing Blu-ray movies on Amazon Kindle Fire HDX 8.9, Fire HD, Fire HD 6, Fire, Kindle Fire HD Kids Edition, Kindle Voyage, Kindle etc. If we can play Blu-ray movies on the go, that will be exciting. But, how can we copy Blu-ray to Kindle Fire? All the purchased Blu-ray disc movies are protected, we can’t copy the movie directly, is there a method or tool that can help us to play Blu-ray on Amazon Kindle Fire?

As we talked above, the purchased Blu-ray movies are protected that we can’t copy Blu-ray to Kindle Fire HD 6 for watching directly, but please don’t worry about, now we have a powerful software that can help you, it is Pavtube BDMagic, this software can rip Blu-ray or DVD to Kindle Fire supported video format, latest Blu-ray and DVD disc movies are also supported, besides Blu-ray/DVD disc, it also supports Blu-ray/DVD ISO file, or folder files, it can also convert HD videos for you, such as MKV, AVI, WMV, FLV, MOV, MP4, MPG, MTS, MXF, VOB, TiVo, etc. It is best Blu-ray to Kindle Fire Ripper for you. Read the review.

Review

Pavtube BDMagic ranks top on the list of Blu-ray Rippers for its versatile features-it can import most of Blu-ray discs protected Blu-ray Disc and unprotected Blu-ray discs. With it you can “Full copy your Blu-ray” or directly copy your Blu-rays without extra. You can convert your Blu-rays to more than 200 video/audio formats, and you also can transfer them to your iPhone, iPad, iPod or Anroid Tablets and Phones. More prominent, you can convert 2D Blu-ray or 3D Blu-ray to 3D effect, and you can with 3D Movies on home theater. It also comes with editor, you can also edit your Blu-ray by yourself. There are more humane setting, waiting for your visit!

Highlights

• 1:1 backup Blu-ray without quality loss.
• Convert 2D/3D Blu-ray to HD video format with 3D effects.
• Edit Blu-ray by trimming, cropping, merging and add watermark.
• Freely to choose the audio/subtitles and set the parameter for the format according to yourself.
• Capable of extracting audio from Blu-ray and DVD movies for iTunes and QuickTime.
• More…

Availability

Free trial for three months. Only $49 (If you buy now, only need $39.2) for lifetime license and upgrade.

Free Download and trail: 

          

Other Download:

- Pavtube old official address: http://www.pavtube.cn/blu-ray-ripper/
- Cnet Download: http://download.cnet.com/Pavtube-BDMagic/3000-7970_4-75922877.html

Best Kindle/Fire/Fire HD Video Playback Guide or Tips 

• Running Google Apps on Amazon Kindle Fire HDX
• 11 helpful tips to improve your Kindle Fire HDX
• Download, Transfer and Sync media Files to Your Kindle Fire HDX
• Rip and Copy Blu-ray to Kindle Fire HDX
• Play/Copy 1080p/720p Videos, Blu-ray and DVD Movies to Kindle Fire HDX
• Transfer iTunes movie and Digital Copy to Kindle Fire HDX
• DVD to Kindle Fire HDX-Rip and copy DVD to Kindle Fire HDX 7/8.9
• Can you transfer iTunes movies to Kindle Fire 7?
• Enable Kindle Fire HDX, Kindle Fire HD to play MPG/MPEG video files
• Play DVD VOB movies to Kindle Fire HDX directly

Summary: Let you transfer or backup regular 2D/3D Blu-rays to side-by-side 3D MP4 for Surface Book, so that you can watch 3D movies on Surface Book on the go.

Hot Search: 3D Blu-ray on ATV 3 | 3D Blu-ray to Stereoscopic Player | Blu-ray to Android

If you a one of the Surface Book users, this article may be helpful on how to put/stream Blu-ray movies to Surface Book for enjoying. As far as we know, Surface Book can play almost any media files that have been transferred to it, including Internet videos, DVR recordings, Camcorder shootings, even DVD and Blu-ray movies that have been ripped are supported.

So, in order to enjoy 2D/3D Blu-ray movies on Surface Book is not a problem any more. The main task you should overcome is how to rip 2D/3D Blu-ray to Surface Book with high video quality and smooth playing experience. All you needed is a powerful 2D/3D Ripper.

I would recommend you a professional Blu-ray Ripper--Pavtube BDMagic. With it you can convert 2D Blu-ray, 3D Blu-ray with High-Definition formats or even create 3D videos with excellent video/audio quality in fast conversion speed. Meanwhile, it provides you easily convert 2D Blu-ray from discs and folders to 3D videos in MKV/MP4/MOV/WMV/AVI formats with Side-by-Side, Top-Bottom, or Anaglyph 3D effect. Besides, you are allowed to set the 3D depth to adjust the 3D effect. If you are a Mac user, please turn to Pavtube BDMagic for Mac. Cut the cackle, download the magically ripper and start to backup 2D/3D Blu-ray to your Surface Book.

          

Other Download:
- Pavtube old official address: http://www.pavtube.cn/blu-ray-ripper/
- Cnet Download: http://download.cnet.com/Pavtube-BDMagic/3000-7970_4-75922877.html

          

Other Download:
- Pavtube old official address: http://www.pavtube.cn/blu-ray-ripper-mac/
- Cnet Download: http://download.cnet.com/Pavtube-BDMagic/3000-7970_4-76177782.html

Backup 2D/3D Blu-ray on Surface Book

Step 1: Load Blu-ray Movie

Insert your Blu-ray disc into BD drive and launch the BDMgic Converter. Click “file”  to load the source movie from your Blu-ray disc. This converter will choose the target needed to copy automatically. Then look down the bottom of the interface, you can use “browse” to set your output folder.



Step 2: Select target output format.

Here you can choose regular Multi-track MKV(*.mkv) or H.265 HEVC MP4(*.mp4) for regular Blu-ray experience. “Muti-track Video” can give you original video and amazing audio effect. 



Or you can click 3D Video, then choose MKV side-by-side 3D Video(*.mkv) for 3D Blu-ray. Different effect based on the format you choose.



Step 3. Start 2D/3D Blu-ray to Surface conversion.

Click on “Convert” to start 3D Blu-ray to Surface conversion.

Read More:

• Directly Copy 3D Blu-ray to Plex With 3D Effects 
• Put 3D Contents on VR One for Galaxy S6 Enjoyment 
• Play 3D Blu-ray on iPhone 6 through Zeiss VR One 
• Rip 2D Blu-ray/DVD to 3D SBS MP4 for Lakento VR glasses 
• Spend leisure time on 3D Blu-ray movie via Gear VR from Galaxy Note 4 

CD / DVD Drive on my Mac keeps ejecting every CD / DVD

My CD/ DVD drive on my iMac is going crazy. Soon after I put a CD or DVD in the drive, it spits it back out. it sounds as though it is trying to read the disc, but fails. My drive was working normal earlier today, then it went crazy.I thought its my CD / DVD drive which is faulty and needs to be replaced so I plugged in a USB CD / DVD drive to my Mac that I had purchased long time ago.When I inserted any DVD in the external CD / DVD drive it did the same thing- ejected it.It keeps ejecting the CD / DVD automatically.Then I thought it must be a software problem so I did a research and found various troubleshooting steps to fix it.I am going to share the complete troubleshooting for this "CD / DVD keeps ejecting on Mac" issue which could be result of various reason like dust on lens,OS X issue, hardware fault.


1. Clean the SuperDrive’s slot with compressed gas/ Vaccum Cleaner

Your CD / DVD drive on your Mac might have got dust in its lens so clean the dust out. I bought this air duster Ecola Vacuum Cleaner ( for Keyboard,Notebook,Computer,Car etc. Compressed Air Duster ) just for $15 from Amazon, It can vacuum out dust and dirt from the chink of the keypad of calculator,telephone,computer,car and so on so give it a good spray into the CD / DVD drive slot on your Mac and this will resolve the problem.To do this first Shutdown your computer and get a can of compressed air. Place the tip of the nozzle attachement where it is aiming inside the drive and give it a couple of quick blasts to blow out any dust particles that may be causing you issue. Power up the system and give it another try.
I found this working for one of my customers once.

CD / DVD Drive on my Mac keeps ejecting

CD / DVD Drive on my Mac keeps ejecting

2. Reset the NVRAM/PRAM and SMC

A small amount of your computer’s memory, called “non-volatile random-access memory” or NVRAM, stores certain settings in a location that OS X can access quickly. The settings that are stored in NVRAM depend on the type of Mac youre using, and the types of devices connected to it.
Power related settings can be controlled by the System Management Controller (SMC) on your Mac. If you are experiencing issues with powering on your computer, sleep, wake, charging your Mac notebook battery, or other power-related symptoms, you might need to reset the SMC instead.

you can find reset instructions for both here: 

Reset NVRAM and PRAM. - Shut down the computer.
Holding down the Command(Apple), Option, P, and R and then hold the Power button simultaneously, and told me to do that 3 times and wait for 3 loud buzzing (or some odd sound I cant describe).

Resetting the System Management Controller (SMC).


3. Delete the Finder’s preference files

Some people have reported successfully fixing Optical CD/DVD Drive on Mac or SuperDrive issues by deleting the Finder’s preference files (don’t worry, the Finder will automatically make new ones). You’ll want to delete two files: “com.apple.finder.plist” and “com.apple.sidebarlists.plist”. Both of these files are located in Users > [Your User] > Library > Preferences. You can choose whether you want to move the files to a new location (or simply append “.old” or something similar to the file names) or delete them, either way should work. Once you’ve deleted both preference files ("Com.apple.finder.plist“.sidebarlists” one might not exist, that isn’t necessarily a problem), you’ll need to relaunch Finder. You can accomplish this by restarting your Mac or by bringing up the force quit menu with Command + Option + Esc (if you go this route, simply select Finder and click Relaunch.
Didn’t fix your issue? Try 4.

4. Run Disk Utility and Repair Disk Permission

Disk Utility lets you verify and repair Mac OS X disks and permissions issues.To repair Disk permissions follow the below mentioned steps.

1. Choose Go > Utilities.
2. Double-click Disk Utility.
3. Select the volume in the left pane for which you want to repair permissions.
4. Click the First Aid tab.
5. Select the volume to which you want to install the Adobe application, and then click Repair Disk Permissions.

CD / DVD Drive on my Mac keeps ejecting

5.  Delete the following configuration file to create a fresh copy


Your Mac store the information of the every CD you put into the CD / DVD drive in a file called CD Info.cidb.Similarly some other files contains info about the settings and configuration of the drive and disk.Deleting them will allow OS X to create a fresh copy of them.Delete the following files from your Mac.

1. ~/Library/Caches (your local Library directory). 
2. System/Library/extensions.kextcache.
3. /System/Library/Extensions.mkext.
4. /System/Library/Caches/com.apple.kernelcaches (a directory).
5. /System/Library/Caches/com.apple.romextensions (a directory).
6. CD Info.cidb (from ~Home/Library/Preferences).

Some of the files or directory might not exist on your Mac so dont worry about it if it isnt there. Restart your Mac after you do this so OS X will rebuild some of the files.


Note: - If the CD/DVD in your optical disk drive or SuperDrive has stuck in the tray then follow the steps mentioned here http://bookingtohosting.blogspot.com/2015/08/my-mac-computer-doesnt-eject-discs-or.html to eject it.

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