Step 1. Go to Settings->About phone and tap on the “Build number” about 5 times until it says “You are now a developer!”
Step 2. Tap on the back button once, then tap on “Developer options”.
Step 3. Make sure “OEM unlocking” is checked ON.
Step 4. Power off your Pixel or Pixel XL. Then hold down Volume Down and Power buttons together for about 5-7 seconds until you see the bootloader menu (where the Android lies belly up).
Step 5. Connect a USB Type C cable from your phone to your computer.
Step 6. For Windows, install the drivers. If you do not know how to do this, watch the video tutorial. No drivers are required for Mac, Linux, and Chromebook.
Step 7. Open up a command prompt for Windows or terminal for Mac/Linux/Chromebook and type:
fastboot flashing unlock
chmod 755 *
./fastboot-mac flashing unlock
chmod 755 *
sudo ./fastboot-linux flashing unlock
Step 8. Go to your Pixel or Pixel XL screen, use the Volume keys to select “Yes” then hit the Power key. Your phone should reboot into bootloader mode.
Step 9. Next type:
fastboot boot boot-to-root.img
./fastboot-mac boot boot-to-root.img
sudo ./fastboot-linux boot boot-to-root.img
Step 10. Your phone will reboot. After rebooting, sign into your phone.
Step 11. If you do not see SuperSU app in your app drawer, put it back into bootloader mode (repeat Step 4-5) then redo Step 9. You should see SuperSU on the second try if it didn’t work first time.
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