As promised, I did unroot my Droid Bionic so I can show you how to root Droid Bionic on Mac or Linux. (Click Here for Windows Droid Bionic Root)
Step 1. Connect your Droid Bionic to your computer via USB cable and set your USB connection to “Charge Only” for Mac and “PC Mode” for Linux.
Step 2. Make sure USB debugging is checked under Settings->Applications->Development.
Step 3. Download the rooting files and unzip to your Desktop:
Step 4. Open up a terminal and browse to the droidbionicrootlinux mac directory by typing:
And run the rooting script by typing:
Step 5. Your phone should reboot about 3 times.
Step 6. You should get a message saying your Droid Bionic has been rooted!
Go on your phone and check for SuperUser app, if you have it, you are rooted! Pat yourself on the back!
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You will need a rooted Droid Bionic to install all ROM/kernels.
How to Root Droid Bionic!