I've been trying desperately to get my 4,1 (firmware updated to 5,1) to boot back into High Sierra. Before making upgrades, my Mac Pro ran fine. I'm running a single Xeon X5675, and I upgraded from 16gb of 1033mhz RAM to 32gb of 1333mhz, as well as swapping out the default Nvidia GT 120 for an XFX RX 570 4GB.
During the initial boot, everything went fine until I tried to log in to my account, which got stuck at the spinning wheel. Tried a reboot again, this time the spinning wheel occurred even before selecting the profile. A third boot resulted in a blank grey screen.
Swapped the original hardware back, and now it'll show the boot loading screen, but instead of going to the start-up at half-way, the bar passes half way, takes 15 minutes to reach full, and just freezes there. Tried the SMC reset, obviously tried every safe boot/restore mode/NVRAM reset/Boot drive select key combo (windows mechanical keyboard plugged directly in) to no success. No key combo is working, tbh the keyboard doesn't even turn on immediately when first starting. Even tried removing both my HDDs (Raid 0) and booting, that just ended up at the grey screen with nothing, no missing file icon or anything.
I'm going crazy re-arranging the DIMM slots and PCI slots to no success. Even flashed high sierra to a USB drive but I can't even initiate the proper key commands to access the boot selection. Spent hours searching through various threads but so far no one has ran into my exact scenario. Any help? ?
During the initial boot, everything went fine until I tried to log in to my account, which got stuck at the spinning wheel. Tried a reboot again, this time the spinning wheel occurred even before selecting the profile. A third boot resulted in a blank grey screen.
Swapped the original hardware back, and now it'll show the boot loading screen, but instead of going to the start-up at half-way, the bar passes half way, takes 15 minutes to reach full, and just freezes there. Tried the SMC reset, obviously tried every safe boot/restore mode/NVRAM reset/Boot drive select key combo (windows mechanical keyboard plugged directly in) to no success. No key combo is working, tbh the keyboard doesn't even turn on immediately when first starting. Even tried removing both my HDDs (Raid 0) and booting, that just ended up at the grey screen with nothing, no missing file icon or anything.
I'm going crazy re-arranging the DIMM slots and PCI slots to no success. Even flashed high sierra to a USB drive but I can't even initiate the proper key commands to access the boot selection. Spent hours searching through various threads but so far no one has ran into my exact scenario. Any help? ?
Last edited: