Jailbreak 5.1.1 on iPhone 4 using Redsn0w and Mac

There are many perks to jailbreaking your iPhone 4, regardless of the OS it is currently running on. The following is a tutorial to help you jailbreak 5.1.1 on iPhone 4 using the Redsn0w tool and a Mac computer. Do not attempt to jailbreak iOS 6 with this jailbreak tool. Check out the News and Tutorial sections for the untethered iOS 6 jailbreak guide.

Before anything else make sure you have saved your device’s SHSH blobs and have performed a recent backup. The following steps include using the Redsn0w jailbreak tool as well as upgrading your baseband which might make it impossible or difficult to unlock the device later on.

Step 1
Go to your Mac’s desktop and create a folder you will name Pwnage. Download the latest version of Redsn0w from the Redmond Pie website, download the 5.1.1 firmware and move both files in the Pwnage folder. You don’t have to download the 5.1.1 firmware if your device already runs it.

Step 2

Extract the Redsn0w zip file and launch the .exe file in the unzipped folder. Click the Jailbreak button in the prompted version. There’s a chance the software will ask you which jailbreak method to use. The preferred method is the DFU RAM Disk method, so click Yes to select it when prompted this message: “Use DFU ramdisk method?”

Step 3

It’s time to turn off your device and plug it into the computer. Click Next when you have done this and prepare to follow Redsn0w’s guidelines to enter into DFU mode.

Step 4

The jailbreak tool will send your iPhone into reboot mode and then prepare the final steps of the process. When it’s done “preparing jailbreak data”, you will be prompted a new window where you have to select Cydia in the list of options and then Next.

Step 5

Your iPhone will reboot again while Redsn0w will start uploading the new RAM Disk and Kernel. When the jailbreak is done, Redsn0w will inform you and once the iPhone finishes the reboot process some 5 minutes later the Cydia icon will appear on the SpringBoard.