I have a 2008 Mac Pro (3,1). I'll include the specs at the bottom of this post. Running a 2 TB internal SSD via a PCIe controller (OWC). I was running El Capitan and opted to put in @dosdude1 High Sierra patch in order to be able to run some newer software I couldn’t run on El Capitan.
Following his website's instructions, I installed from a 32GB USB thumb drive. I was surprised that, start to finish, it took literally 34 hours to install. I chalked it up to USB 2.0 on a 10-year-old machine being awfully slow by any modern standard, but I’m not so sure that’s the problem anymore.
I then ran the patch's post-install and selected the default options for a 3,1 Mac Pro, and then rebooted into the SSD. It came up quickly with the password prompt (I run FileVault, so the SSD is encrypted). And then the progress bar started moving to load the rest of the OS. This is where the problems come up. There are two in particular:
1. It hangs perpetually around 95%.
2. The display goes into energy saving mode and will not come back up.
I've let it run for four hours - occasionally poking the keyboard to keep energy saving off. I also on another attempt let it run overnight and then some -- I'd estimate about 11 hours. If it ever got any further than that 95%, I wouldn't know since the energy saver came on and turned off the display and wouldn't restore. That said, subsequent attempts repeat these problems, so I assume it never gets past 95%. It’s an SSD, so I can’t listen for any hard drive mechanical movements nor observe any other activity in the background.
Following the instructions again, I rebooted into the boot USB, ran the post installer again, and this time opted for the Force Rebuild option for the caches. Rebooted back into the SSD. Same problems. I turned off the machine and let it sit for a few days and went back to my MacBook Pro while I researched and thought through what’s going on.
I next decided to try building a new boot drive w/ High Sierra and the patch, on the off chance either the original USB installer was corrupted somehow or perhaps USB 2.0 performance is slow enough to be causing some issues. This time I used a LaCie 1TB, FireWire 800 external HDD.
Re-ran both the macOS installer and the post install from that drive and also did the forced cache rebuild again. Same exact problem.
When I did the force rebuild, it told me there’s a command I should run from Terminal after booting into HighSierra. I haven’t even been able to get that far to run it.
Is there any point in running that command from Terminal from the installer boot drive?
I also attempted to install a patched HS onto an
empty, internal 1TB HDD. Didn't work.
SIP is disabled as far as I know. I did so successfully at the outset of all of this and I have not reset my PRAM or anything. Since the system hasn't run anything but these installers since then, I have no reason to believe the system itself has reset the SIP.
The SSD is not APFS, unless the installer converted it automatically
Might any of you, or perhaps even @dosdude1 himself, have any idea (A) what's causing this; and (B) how I might be able to solve it?
The machine is not strictly OEM spec anymore. These are the relevant details:
- Dual 2.8 GHz Quad Core (Xeon Harpertown E5462 x2; factory-provided configuration)
- Internal HDD in bay 2, 1 TB (unused except for efforts above)
- 64 GB of 800MHz DDR2 EEC FB-DIMM RAM (OWC sourced)
- Primary drive -- internal, Extreme 6G SSD, 2 TB, running on a PCIe controller (OWC sourced)
- Nvida Quadro 4000, 256 CUDA cores and 2GB (sourced direct)
- All other parts and configurations are OEM specs and supplied