Hi,
I’ve recently upgraded the processors and graphics card in my Mac Pro and everything was working fine using OS Mojave. To speed things up I added a PCIe SSD Card and cloned it (Carbon Copy Cloner) from my existing bootable drive. I then set it to be my startup drive. Seems that this was a very bad mistake.
The Mac Pro refused to boot, the machine started but there was no display or customary chime. Then, I took all the drives out, replaced the graphics card with the original RX 5770 (non-metal) and popped a bootable High Sierra USB thumbdrive in the front. I reckoned that the Mac would search for a bootable drive and use the thumbdrive which I can then designate as the startup disk, reinsert the PCIe SDD, restart, reformat the SDD and do a fresh install of High Sierra, upgrade to Mojave and migrate the original information. But still nothing, same result. I have also tried all the various startup key combinations but they don’tvwork Either.
I’m completely lost as to what to do next and would really appreciate any ideas.
I’ve recently upgraded the processors and graphics card in my Mac Pro and everything was working fine using OS Mojave. To speed things up I added a PCIe SSD Card and cloned it (Carbon Copy Cloner) from my existing bootable drive. I then set it to be my startup drive. Seems that this was a very bad mistake.
The Mac Pro refused to boot, the machine started but there was no display or customary chime. Then, I took all the drives out, replaced the graphics card with the original RX 5770 (non-metal) and popped a bootable High Sierra USB thumbdrive in the front. I reckoned that the Mac would search for a bootable drive and use the thumbdrive which I can then designate as the startup disk, reinsert the PCIe SDD, restart, reformat the SDD and do a fresh install of High Sierra, upgrade to Mojave and migrate the original information. But still nothing, same result. I have also tried all the various startup key combinations but they don’tvwork Either.
I’m completely lost as to what to do next and would really appreciate any ideas.