Rolling Back O.S.

[jjsoundoc]

My '09 Mac Pro needed to be replaced so I ordered a Mac Mini.
It was my understanding that Catalina could be rolled back to Mojave.
I sent the computer to OWC for a RAM upgrade and the O.S. rollback.
They called to say they couldn't roll it back.
Has anyone done this successfully, or sent it to someone else to do the work?
I did try to buy a mini with Mojave installed but couldn't find any.
I work in sound to pic so don't want to jump through the hoops that Catalina requires.
Thanks for any help,
JJ

[JFreak]

Which model exactly? Go to Apple menu, About This Mac, System Report and from there tell us the Model Identifier that you can see from Hardware Overview

[JFreak]

As far as I know all Mac Minis should be able to run with Mojave so just download installer from App Store, create a bootable USB installer (google for instructions), then wipe the hard drive and install.

[jjsoundoc]

Janne,

The computer is being shipped back to me so can't access the model identifier.

[JFreak]

Well once you have it back you can do it yourself. Just have 16GB or larger USB stick ready

[jjsoundoc]

I'll give it a try. Surprised that OWC couldn't do it..

[JFreak]

Too much manual work. T2 chip makes it tough to just clone a drive from old copy. Need to actually install it by hand. While you wait for your mini to arrive, you could also do some research regarding that T2 thing

[jjsoundoc]

Will do research. Thanks for your help.
John

[JFreak]

No problem.

With that said, what you are going to do I have not done myself. But it should be possible. Worst case scenario you will do a clean install of latest Catalina and have to deal with it

[smurfyou]

I got one a month or so ago and I installed Mojave on it. Using a USB stick.

I think I did have to first go into Recovery and do a few things to allow it. I'm sorry I can't remember the specifics but plenty of info out there. Wasn't hard.