MP 7,1 Installation procedure for Mojave on MacPro7,1?

[vailr]

Dual booting Mojave & Catalina (on separate SSD's) on the 2019 MacPro?
Or: is it possible to replace the factory installed Catalina with Mojave on the T2 controlled SSD?
Thanks.

 

[tsialex]

Dual booting Mojave & Catalina (on separate SSD's) on the 2019 MacPro?
Or: is it possible to replace the factory installed Catalina with Mojave on the T2 controlled SSD?
Thanks.

2019 Mac Pro official macOS support starts with 10.15.1, you can't boot anything earlier. Only Apple has Mojave internal builds that work, no public builds of Mojave will work with MP7,1.

You can boot external disks without problem, just boot Recovery and use Startup Security Utility.

Btw, the only internal disk to the 2019 Mac Pro firmware is the T2 storage, even the two SATA ports, or any PCIe SSDs for the matter, are external to the firmware.

 

[vailr]

Ok, so has anyone tried installing Mojave on the 2019 Mac Pro? Maybe via: using certain Hackintosh methods, like: making Mojave think it's being installed on an iMacPro, for example? Or simply, take a bootable SSD working copy of Mojave, plugging it into a 2019 Mac Pro, and see if it can boot?

 

[MarkC426]

Is there not a possibility you would be missing drivers for 2019 specific hardware if you install Mojave?
Especially if it is not officially supported.

 

[bsbeamer]

Or simply, take a bootable SSD working copy of Mojave, plugging it into a 2019 Mac Pro, and see if it can boot?

Follow the directions @tsialex laid out in post #2 and try yourself, but you will prove the point already mentioned to you - no public build of Mojave supports MP7,1. Doubtful any public beta builds released before MP7,1's shipping would even work. There were reports initial MP7,1's needed to be updated immediately upon receipt, which signals an internal test build of Catalina was used instead of Mojave.

AFAIK, the only beta that you can access publicly without being part of the developer program is for this specific build of High Sierra:

5 041-90855 10.13.5 17F66a 2019-10-23 Install macOS High Sierra Beta