How to Jailbreak Your iPhone 3GS Using PwnageTool Mac 4.0

These are instructions on how to jailbreak your iPhone 3GS on iOS 4.0 using PwnageTool for Mac.

Currently, PwnageTool only works on previously jailbroken 3GS devices with the old bootrom.

If you have a Jailbroken iPhone 3GS with the OLD BOOTROM and you DID NOT use Spirit to jailbreak then you can create the ipsw with PwnageTool 4.0 and restore with your jailbroken recovery mode.
If you have an iPhone 3GS with the NEW BOOTROM this is NOT supported by PwnageTool 4.0. Please don't use this tutorial.

Step One
Make a folder called "Pwnage" on the desktop. In it, you will need a couple of things. PwnageTool 4.0, found here or here

You will also need the 4.0 iPhone firmware.
4.0.0 (3GS): iPhone2,1_4.0_8A293_Restore.ipsw

When downloading the IPSW file, it is best to download it with Firefox since Safari often auto extracts it!


Step Two
Double click to mount PwnageTool then drag the PwnageTool icon into the Pwnage folder.


Then from the Pwnage folder double click to launch the PwnageTool application.


Click Ok if presented with a warning.


Step Three
Click to select Expert Mode from the top menu bar


Step Four
Click to select your iPhone. A check-mark will appear over the image of the phone.


Step Five
Click the blue arrow button to continue. You will be brought to the "Browse for IPSW" page. On my laptop, it automatically found the IPSW. If PwnageTool doesn't automatically find the ipsw file you can click Browse for IPSW....


Click to select the found IPSW file, a checkmark will appear next to it. Then click the blue arrow button to continue.


Step Six
You will then be brought to a menu with several choices. Click to select General then click the blue arrow button.


The General settings allows you to decide the partition size. Check Activate the phone if you are not with an official carrier then click the blue arrow button.


NOTE*: Deselect Activate if you have an iPhone legitimately activated on an official carrier.

The Cydia settings menu allows you to create custom packages so you do not have to manually install the necessary them later.


Click to select the Download packages tab. Then click the Refresh button to display all the available packages. Double clicking the package you want will download it and make it available in the Select Packages tab.


Checkmark the ones you want then Click the blue arrow button.


The Custom Packages Settings menu displays listed package settings for your custom IPSW. For know leave these settings as is. Click the blue arrow button to continue.


The Custom Logos Settings menu allows you to add your own images as boot logos. Click the Browse button to select your Boot logo and Recovery logo. If you would like to use the iClarified ones they can be found here: Boot Logo, Recovery Logo


Remember the rules for them: RGB or Grayscale format with Alpha channel and dimensions below 320x480...


Click the blue arrow button to continue.

Step Seven
You are now ready to begin the pwnage process! Click the Build button to select it then click the Blue arrow button to begin.


Step Eight
You will be asked to save your custom .ipsw file. Save it to your Pwnage folder you created on your Desktop.


Your IPSW is now being built. Please allow up to 10 minutes.


You will be asked to enter your administrator password. Do this then click the OK button.


Step Nine
Once your ipsw has been built you will be asked to place your iPhone into recovery mode. Click OK to close the popup message telling you this, then connect your iPhone to the computer and follow these instructions on how to put your iPhone into recovery mode.


Step Ten
Once In iTunes, hold the Alt/Option key and click Restore.


Step Eleven
Navigate to the Pwnage folder on your desktop using the dialog window that appears. Select the custom IPSW that was created and click the Open button.


Step Twelve
iTunes will now restore the firmware on your iPhone. This can also take up to 10 minutes. Once done you will be rebooted into jailbroken iPhone OS 4.0!

***THANKS: Thank you to the Dev-Team for their hard work in making this jailbreak and tutorial possible!