Therefore for Windows users who own iPhone 4s, 4, 3gs, iPad an also iPod touch and want to jailbreak your device untethered you are pleased to follow the following steps.
Step 1: Download Absinthe 2.0.2.
Step 2: Double click it to mount the downloaded dmg and drag the Absinthe application to your desktop.
Step 3: Now launch Absinthe by double-click on it on desktop.
Step 4: When prompted, plug your device to your PC using USB. Be sure all passcodes or VPN settings are removed first.
Step 5: Now click on the Jailbreak button to begin the jailbreak.
Step 6: Absinthe will begin jailbreaking by going through several steps like beginning jailbreak, sending initial jailbreak data, waiting for reboot and then completing process. Just wait. Till you find this message.
Step 7: Now you should see a Cydia icon appears on your iPhone's homescreen. Which means your iOS 5.1.1 is jailbroken now!
That's how to untethered jailbreak iOS 5.1.1 on iPhone, iPad, iPod touch for Mac using Absinthe 2.0.