MP 1,1-5,1 Where can I download an actual compiled and usable BigMac installer to run Big Sur on a 5,1 Mac Pro?

[barkmonster]

I was wondering if anyone could shed some light on this issue?

This page: -

GitHub - StarPlayrX/bigmac: Big Mac, macOS 11 Big Sur and macOS Monterey disk installer and back up tool for Intel based Macs

Big Mac, macOS 11 Big Sur and macOS Monterey disk installer and back up tool for Intel based Macs - StarPlayrX/bigmac

github.com

Is a sea of programmer orientated blather with no links of any use anywhere.

I tried Patched Sur, which worked fine on my 2012 Mac Mini, but it recommended this apparent vapourware at the final stage when I tried it on my Mac Pro.

Please don't direct me to some long thread with even more blather and no download link I've read all the OpenCore pages thoroughly before posting this.

Patched Sur works flawlessly on my Mac Mini. I run Pro Tools and loads of audio plug-ins under Catalina on my Mac Pro.

The problem is, I sometimes use iMovie and without realising it, once I open a shared iMovie Library made in the last version for Catalina in the current version for Big Sur, it renders the entire iMovie Library unreadable under Catalina because it claims it was created in a newer version and can't be opened now.

This, and the fact Big Sur is much smoother OS than Catalina is why I'm keen to try and get the latest release of Big Sur working on the Mac Pro because it has way more power for editing and encoding than the Mac Mini.

I even tried ditching iMovie and using Resolve but it has permanent issues keeping folders of video files linked between opening so I can't have a nice portable library like I can with iMovie. I literally have to relink every video file manually every time it opens and that's in the very latest update to 18 and specific mention this exact issue has been fixed in the notes on the App Store. It clearly isn't.

Thanks.

 

[krakman]

Use OCLP. Open core legacy patcher.

You can download it from GitHub.

All those other patches are obsolete.

 

[rpmurray]

OpenCore Legacy Patcher. If reading wears you out then Mr. Macintosh has an easy to follow Youtube video on how to install Big Sur using it.

 

[lostPod]

I needed this too -- thanks for posting!

 

[barkmonster]

OpenCore Legacy Patcher. If reading wears you out then Mr. Macintosh has an easy to follow Youtube video on how to install Big Sur using it.

Thanks. I'll have a look. I never had any luck getting OpenCore to work on my Mac Pro when it had it's original 2010 Logic board. Nothing would make the start up disk selector appear so I used Catalina Helper and it worked fine. I have Carbon Copy Cloner and a large enough SATA III SSD to fit my entire boot drive on that's currently on Catalina so I can boot from that and clone back over it again if I struggle installing Big Sur over that install.

 

[barkmonster]

Thanks. I'll have a look. I never had any luck getting OpenCore to work on my Mac Pro when it had it's original 2010 Logic board. Nothing would make the start up disk selector appear so I used Catalina Helper and it worked fine. I have Carbon Copy Cloner and a large enough SATA III SSD to fit my entire boot drive on that's currently on Catalina so I can boot from that and clone back over it again if I struggle installing Big Sur over that install.

Nothing will allow this Mac to display the OC boot picker. It wouldn’t with Catalina Helper either but that worked via Recovery Mode. It just has no signal on any monitor if I either boot with Alt held down for the boot picker or with Command + R it does the same thing. When I turn off at that point, it turns off instantly as if it didn’t even know which disk to boot from at start up. I then boot as normal with no keys held down and it goes to the Catalina desktop and I can open the start up disk preference and see that drive selected as the start up disk. Shutting down also displays the desktop picture with no mouse or menu bar for about a minute before it turns off. This delay happens while restarting too. I’m stumped.