If you can’t wait for the OTA update for Android 4.4 KitKat (KRT16O) to hit your Nexus 10 (mantaray), we have the download link and instructions to manually install it.
If you already have a custom recovery, you can just download the Zip file (linked below), copy it to your device, and flash. If you’re running the stock recovery, then hit the break and follow the instructions.
In order to update, your device needs to be running the latest stock build of Android 4.3 (JWR66Y)
You will need the latest version of adb in order to proceed. Just download the latest Android SDK to make sure you’re up to date.
You also need to download the flashable ZIP file for the 2012 Nexus 10 (mantaray) and place it in the fastboot folder (this location should be C:\program files (x86)\android\android-sdk\platform-tools in Windows)
You must have USB debugging enabled on your Nexus 10. If this is the first time going into developer options on your Nexus 10, just go into “About Tablet” from your settings and tap the build number about seven times. Hit the back key and you will now see all developer options from now on.
Power off your mantaray Nexus 10, and power back on by holding the Volume Up and Volume Down buttons while it boots.
The fastboot menu should appear and you should see “Start” in the top right. Press Volume Up till it changes to “Recovery.” Press the Power button to select it.
You will see an Android with a red exclamation point icon, press Volume Up and the Power button at the same time.
You will get a new menu and you can navigate to “apply update from adb.”
Now it’s time to connect your mantaray Nexus 10 to your computer via a USB cable
Open the command prompt in Windows (cmd in Windows, regular shell in Linux and Mac) and navigate to the directory that the Zip file is located in.