Thank you SO much @tsialex for all your hard work and diligence on this thread. It's giving me the courage to finally try to update my old beast.
I've read the original post repeatedly, and scoured as many of the comments pages as I could, but I want to make sure I have the right answers to 4 questions.
1. I have an EFI flashed radeon r9 280x, and I can't for the life of me find my old original gfx card. (I know it's somewhere, but I've moved three times since I replaced it, so it's hiding somewhere deep in the dungeons). Since the r9 is equivalent to a 7950, does that mean I can begin my attempt at this firmware+high sierra install+firmware+mojave install process using my 280x?
2.
This line is scary as hell to me, because I currently dual boot Windows 10 installed from a windows dvd (does that mean it's UEFI installed? I can't quite understand what that means in this context) and OSX 10.8.5 running on separate drives, by holding alt at startup and choosing my boot disk. Can you confirm that upgrading *PAST* this firmware (to the recommended first step of MP51.0089.B00, and then on to the mojave firmware) will NOT brick my computer if I continue to dual boot with Windows 10? Does Mojave play nice with a Windows 10? I can't seem to find much solid information about this.
3. I think I got this part, but I want to make sure: I can *update* from 10.8.5 using the High Sierra installer without wiping my current disk (yes I'll be backing up my 10.8.5 system with a cloned drive of course, but still), and then *update* from High Sierra to Mojave without wiping the disk, right? The high sierra install will replace the HFS+ filesystem with an APFS while keeping the file system intact, so I don't need to do all this on a separate clean drive that's already formatted to work with APFS?
4. Since the mojave firmware will allow for previous OS's to boot still, I can definitely keep my old disk and continue to boot to it in 10.8.5 while having my new/cloned disk run mojave? There shouldn't be any change with the way I was running 10.8.5 on my old disk just because there's new firmware?
My apologies if this stuff was already answered in the comments, or if I misunderstood anything in the original post, but it was hard to wade through all 71 pages of comments. Any advice would be really appreciated. Thanks again for all your work!
Mac Pro 5,1 Mid 2010
2 x 2.4 quad core xeon
22gb 1066mhz ram
AMD radeon r9 280x 3gb
OS X 10.8.5 / Windows 10 on separate drives
I've read the original post repeatedly, and scoured as many of the comments pages as I could, but I want to make sure I have the right answers to 4 questions.
1. I have an EFI flashed radeon r9 280x, and I can't for the life of me find my old original gfx card. (I know it's somewhere, but I've moved three times since I replaced it, so it's hiding somewhere deep in the dungeons). Since the r9 is equivalent to a 7950, does that mean I can begin my attempt at this firmware+high sierra install+firmware+mojave install process using my 280x?
2.
MP51.0087.B00 | 10.13.5 | General release | Missing microcodes and bricks the Mac Pro if you boot UEFI installed Windows 10 |
3. I think I got this part, but I want to make sure: I can *update* from 10.8.5 using the High Sierra installer without wiping my current disk (yes I'll be backing up my 10.8.5 system with a cloned drive of course, but still), and then *update* from High Sierra to Mojave without wiping the disk, right? The high sierra install will replace the HFS+ filesystem with an APFS while keeping the file system intact, so I don't need to do all this on a separate clean drive that's already formatted to work with APFS?
4. Since the mojave firmware will allow for previous OS's to boot still, I can definitely keep my old disk and continue to boot to it in 10.8.5 while having my new/cloned disk run mojave? There shouldn't be any change with the way I was running 10.8.5 on my old disk just because there's new firmware?
My apologies if this stuff was already answered in the comments, or if I misunderstood anything in the original post, but it was hard to wade through all 71 pages of comments. Any advice would be really appreciated. Thanks again for all your work!
Mac Pro 5,1 Mid 2010
2 x 2.4 quad core xeon
22gb 1066mhz ram
AMD radeon r9 280x 3gb
OS X 10.8.5 / Windows 10 on separate drives