How to Unroot/Install Jelly Bean 4.1.2 on Galaxy Nexus GSM! [Mac]

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Click here for Windows version. 

This guide will install the official Jelly Bean 4.1.2 on Galaxy Nexus GSM i9250 and also unroot your phone. Yes, after using this method you can send it back to the manufacture/carrier. 

Note! This will delete everything on your phone. Backup your phone! 

1. Go to Settings > Developer Options, then turn on USB debugging. 

2. Plug in your phone via microUSB. 

3. Download and extract Galaxy Nexus GSM Unroot/Stock 4.1.2 below. 

 Download Galaxy Nexus GSM Unroot/Stock 4.1.2


4. In the folder click on "Click Me.tool" 


5. Press enter, wait until your phone finishes booting up and your done! 


Only continue if you are going to send to back to your carrier or manufacture. 

6. Once your phone has finished booting up go into Settings > Developer Options, and turn on USB debugging again. 

7. Press enter on your computer screen and your done! Press the enter to reboot and your phone is now safe to send back to your carrier or manufacture.


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FOR EMERGENCIES: (Bricked phone, not turning on, ect) 
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