Google Nexus 7 receives Android 4.2 Jelly Bean with manual installation guide

We recently reported that the Google Galaxy Nexus was receiving the Android 4.2 Jelly Bean software update. The update has now been extended to the Google Nexus 7. The update is being offered OTA and can be accessed by heading over to Settings > About Tablet > Software Update where you can check if the update is available in your region.

If you haven't received the update, you could consider manually updating your device, but keep in mind that the update may fail if your devices doesn’t meet certain requirements.

[NOTE] If you haven't rooted your device with ClockworkMod Recovery running, you will have to manually push the update using ADB from the Android SDK.

[NOTE] You cannot have any leaked Android 4.2 apps installed on your device. If you have flashed the new keyboard, camera or GMail apps you will have to restore your stock Android 4.1.2 build JZO54K before you can proceed with the guide

[DISCLAIMER] We do not recommend, flashing or installing pre-release or custom ROMs on your device unless you are aware of the consequences of these tasks being performed improperly. You will have to take responsibility for any loss of data or device malfunction which may occur on your device as a result of following this process. Please proceed at your own risk.

1. Download the  JOP40C update file.
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2. Download and install the Android SDK, if you don’t have it already.
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3. Reboot your Nexus 7 and press both the Volume Up + Volume Down buttons while the device boots up.
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4. When you see the fastboot menu, press Volume Up until you see ‘Recovery’ and press the ‘Power’ button.
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5. When the device switches to Recovery mode, you will see an Android with a red exclamation icon.
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6. Now press ‘Volume Up’ and the ‘Power’ buttons together, which will bring the Recovery menu.
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7. Select ‘Apply update from adb’.
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8. Connect your device to your computer using the USB cable.
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9. Open command prompt (cmd in Windows, or terminal in Linux and Mac) and navigate to the directory where you downloaded the  JOP40C update file.
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10. Type the following: adb sideload 094f6629314a.signed-nakasi-JOP40C-from-JZO54K.094f6629.zip
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11. You will now see a progress bar, which will reach 100% once the update has been installed on your device.
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12. Reboot your device, and you should now have Android 4.2 installed on your device.

source – PhoneArena