The guide to jailbreak iOS 7.1.2 does not differ from what we have published for iOS 7.1 and 7.1.1, respectively, in the Windows version and Mac For this reason, if you are interested in jailbreak iOS 7.1.2 on your device Apple, we recommend that you follow the instructions in the guides found below:
How to jailbreak iOS 7.1.x on Windows
How to jailbreak iOS 7.1.x on Mac