How To: Jailbreak iPad 4.2 GM With PwnageTool

Those of you who are running an iPad on iOS4.2 GM can already jailbreak your device, so if you are one of those people who has been waiting for a jailbreak before downloading the update, here's your chance.
**Important** Always back up your devices before jailbreaking

1) First, you will want to upgrade your iPad to iOS 4.2 GM. We posted a tutorial, which can be found: Here.
2) Now, you will want to download PwnageTool 4.1:
PwnageTool 4.1.2 Torrent  - PwnageTool_4.1.2.dmg.5904259.TPB.torrent
SHA1 Sum = 1c0d5ea45464e336fcb38c644dc125c3a16b5493
(If that doesn't work, you can find mirrors here)
3) Download the latest version of PwnageTool Bundle for iPad: Here
4) Copy the version of PwnageTool you downloaded on step 2 to your desktop. Right click and go to "Show Package Contents."
Screen shot 2010-11-16 at 12.47.31 PM
5) Go to Contents/Resources/FirmwareBundles/ and drop in the the iPad1,1_4.2_8C134b.bundle file to this location.
Should look something like this now:
Screen shot 2010-11-16 at 12.48.35 PM
6) Now you will take the file and Info.plist.patch and put them into the same directory as, but not inside the bundle. Run the script via terminal. Note that if you do not run this patch it will break sandboxing and Safari will not run unless you do a tethered boot.
Screen shot 2010-11-16 at 12.50.17 PM

 7) Now run PwnageTool, select the iPad as your device and follow the onscreen prompts from PwnageTool.

8) Now You wait a bit. PwnageTool will begin building a custom .ipsw file for your iPad. Save it to your desktop.

9) You must now enter DFU mode. This can be a bit tricky at first, but the onscreen instructions will guide you accordingly.

Screen shot 2010-11-16 at 1.19.26 PM
10) When successful, iTunes will run tell you that it detects a device in recovery mode.

11) From here, you must Alt-click on Restore. You will be prompted to select the location of your custom firmware.

12) Select the custom firmware ipsw that was created, and hit ok.

13) From here, you must wait while iTunes installs the new firmware on your device, which should restart automatically when the process is complete.

14) Now re-sync your iPad.

You are done, any questions/comments leave them below.
Jailbreak iPad iOS 4.2 GM using PwnageTool

Here another point of view with more download Links

Jailbreak iPad iOS 4.2 GM using PwnageTool

PwnageTool Bundle for jailbreaking iPad 4.2 GM with old bootrom on iOS 4.2 has been released containing patch for broken Cydia. You can use this bundle with existing version of PwnageTool to create custom firmware files which are jailbroken and hacktivated for iPad. The following step by step guide will help you on how to patch the existing version of PwnageTool so that it can jailbreak iOS 4.2 GM on iPad. The steps are almost similar to jailbreaking iPhone 3GS as posted before.

Jailbreak iOS 4.2 iPad - PwnageTool
Step 1: Download PwnageTool 4.1 from here.

Step 2: Download the latest version of PwnageTool Bundle for iPad 4.2 GM from here and then extract it to your desktop.

Step 3: Download iOS 4.2 GM for iPad and iTunes 10.1.

Step 4: Copy PwnageTool that you downloaded in Step 1 to your desktop. Right click, and then click on “Show Package Contents”.

Step 5: Navigate to Contents/Resources/FirmwareBundles/ and paste iPad1,1_4.2_8C134b.bundle file in this location. Now, simply close this folder.

Step 6: Put and Info.plist.patch in the same directory as (NOT inside the bundle). Run the script. If you do not run this patch to remove Cydia, it will break sandboxing and MobileSafari will not run unless you do a tethered boot.

Step 7: Now start this patched version of PwnageTool, Select iPad as your device and you will now notice that PwnageTool will automatically detect iOS 4.2 GM firmware.

Step 8: Click “No” when PwnageTool prompts “Do you have an iPhone contract that would activate normally through iTunes?”.

Selecting “Yes” will update your baseband to the latest version. Click on “Yes” only if you are on an officially supported carrier like AT&T.

Step 9: PwnageTool will now create the custom .ipsw file for your iPad which will be jailbroken. You will be prompted to save custom .ipsw firmware file. Save it to the desktop. It might take 10-15 minutes for building custom firmware.

Step 10: Now its time to restore your iPad to this custom firmware 4.2 GM.
  • Click on your iPad icon from the sidebar in iTunes.
  • Press and hold left “alt” button (”Shift” button on Windows) on the keyboard and then click on “Restore” (Not “Update” or “Check for Update”) button in the iTunes
  • Now, release the “Shift” button.
Step 11: iTunes will now prompt you to select the location for your custom firmware 4.1 Once your iPad is successfully in DFU mode.

Step 12: Now select the custom IPSW that was created and click the Choose button. Wait for a while till iTunes installs the new firmware 4.2 on your iPad. After the installation is done, your iPad will restart automatically. You have now successfully jailbroken iPad running iOS 4.2 GM.

Note: To use unsigned programs, you need the tetherdboot tool from . Unzip the ipsw, and put the iBSS.k48ap.RELEASE.dfu and kernelcache.release.k48 someplace, like your home directory. Put the iPad in DFU mode, open the terminal and do tetheredboot iBSS.k48ap. RELEASE.dfu kernelcache.release.k48 and after a white screen the ipad will reboot and you can run unsigned apps.