- Jun 9, 2013
- Gigabyte GA-H77N-WIFI
- HD 4000
- Mobile Phone
In order to test your system definition, navigate to the upper left corner and choose About This Mac. A window will open showing the booted system definition. If this shows Mac Pro (2008) or Mac Pro (2009) you will need to change your system definition before installing macOS Sierra. In fact, you will not be able to download macOS Sierra until you change it.
This is a pain for real Mac Pros, as they now have to trick the OS into supporting their platform. However for CustoMacs, changing your system definition is very simple.
1. Get the latest version of MultiBeast for El Capitan
2. Choose Customise > System Definitions > iMac > iMac14,2
3. Choose Build > Install
4. Reboot system
Hope this helps!
Nice write up Tony . Just seems a bit odd that Mac Pro 3,1 & 4,1 has been discontinued in 10.12 as they are 64bit Machines.