Key Notes:
As Apple has decided to not support Sierra on the MacPro 3,1 , there needs to be modifications performed to allow Sierra to be installed on the Mac Pro 3,1
This installation guide ONLY applies for the Mac Pro 3,1.
I performed these steps on El Capitan - I have no idea if they will work on OS’s prior to that.
Note that the only way you’ll be able to install Sierra is to create a boot partition of the Sierra install - you won’t be able to simply double click on the install from...
Mac Pro 3,1 Installation Guide for Sierra
As Apple has decided to not support Sierra on the MacPro 3,1 , there needs to be modifications performed to allow Sierra to be installed on the Mac Pro 3,1
This installation guide ONLY applies for the Mac Pro 3,1.
I performed these steps on El Capitan - I have no idea if they will work on OS’s prior to that.
Note that the only way you’ll be able to install Sierra is to create a boot partition of the Sierra install - you won’t be able to simply double click on the install from...
Mac Pro 3,1 Installation Guide for Sierra