Taig Team has released a new version of its Taig tool to jailbreak iOS 8.4 on Mac. This new number is Version 1.1.0 fixes a problem with blank screen that some users on Mac OS X 10.9 encountered. If you’ve already done the jailbreak your device on iOS 8.4, so no need to do it again.
For others, you can follow our tutorial on this link: Tutorial on how Jailbreak iOS 8.4 on Mac with Taig. We advise you to backup your device to make a new restoration just before the jailbreak. Thus, you are sure not to have to worry during the jailbreak process.
TaiG 1.1.0 for Mac can be found on our jailbreak tools page.