How to Install a Untethered Jailbreak for iPad iOS 4.2.1 On a Mac

Finally, after a couple of months since the release of iOS 4.2.1 we have a untethered jailbreak for the iPad.

It did take longer than expected but thanks to the Chronic Dev-Team we now have Greenpois0n, a untethered jailbreak for iOS 4.2.1.

This tutorial explains how to jailbreak your iPad iOS 4.2.1 using a Mac, click here to view the Windows tutorial.

Before you get started you should plug your iPad into the computer and sync your iPad ( If your iPad is already Jailbroken, restore it in iTunes before using Greenpois0n). Then, quit iTunes and turn off your iPad.

  1. You can download Greenpois0n from here or go to the website http://www.greenpois0n.com.
    Save the file to your desktop when prompted.
  2. Double click the file to extract it and click on the Greenpois0n icon.
  3. Click the Jailbreak button and follow the instructions. This will put your iPad in DFU mode.
  4. Click the Complete button after Greenpois0n has finished installing. This will exit the computer application.
  5. You should see some text scrolling on your iPad. After the iPad restarts, you will have a loader icon on your iPad.


  6. Tap on the loader icon then select and install Cydia.


  7. Once Cydia has installed, you can remove the loader app. You should now have a untethered jailbroken iPad.


  8. You can sync your iPad to reinstall your iPad content.

Leave a Reply

Your email address will not be published. Required fields are marked *