Now Mac users can also use their computers to jailbreak iOS 8.1.2 on their devices. PP jailbreak tool is the latest release which can be used to jailbreak your iPhone 6 Plus, 6, 5s, 5c, 5, 4s on iOS 8.0 up to iOS 8.1.2 Jailbreak for Mac.
Here are the steps on how to jailbreak 8.1.2 On Mac
Please make sure that you have backed up your device before you try to jailbreak ios 8.1.2 using the Mac computer because this is important for the situation in which your device stops responding after jailbreak 8.1.2. Although it is not common but you should be careful and understand that jailbreaking may impact the data and apps if errors are faced,
Now double click the dmg file to mount it. Tap Settings from your Springboard then select Touch ID & Passcode. Turn Passcode Off if it is enabled.
Go to Settings => iCloud => Find My iPhone and ensure that Find My iPhone switch is the Off.
Now launch the PP Jailbreak program and connect your iPhone to your computer.
You will see the device is detected by the software with its model and version of iOS. Now uncheck the checkbox at the bottom left of the PP window then click the large button in the middle of window to begin your iOS 8.1.2 jailbreak.
Once you see below screen click the large button to right to confirm you’ve disabled Find My iPhone and Touch ID.
Now you will see the progress status of jailbreak process. Wait until you see below screen with green checkbox. Now your device is jailbroken and Cydia can be used now.
Once the jailbreak for iOS 8.1.2 has completed successfully, you will be shown a green checkmark on the pp tool screen, your iPhone will reboot and a Cydia app will appear on your Springboard. Congratulations, you’re now jailbroken!