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macrumors newbie
Original poster
Aug 27, 2023

My macpro 5.1 keeps on crashing after boot. It can stay for a very long time on the login screen without issues however , it crashes after boot. I can access safe mode no problem, just very slow graphics then.
Sometimes it passes the boot and holds for an hour then crashes again.
Here is the error log if it helps:
*** Panic Report ***

panic(cpu 0 caller 0xffffff7f8b710456): NVRM[0/5:0:0]: Read Error 0x0061002c: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0x8a000000 0xffffff9d7cab0000 0x096000c1, D0, P1/2

Backtrace (CPU 0), Frame : Return Address

0xffffff9d7b93b960 : 0xffffff800a26ae56

0xffffff9d7b93b9b0 : 0xffffff800a394434

0xffffff9d7b93b9f0 : 0xffffff800a386604

0xffffff9d7b93ba60 : 0xffffff800a21ce60

0xffffff9d7b93ba80 : 0xffffff800a26a8cc

0xffffff9d7b93bbb0 : 0xffffff800a26a68c

0xffffff9d7b93bc10 : 0xffffff7f8b710456

0xffffff9d7b93bcd0 : 0xffffff7f8b7dc1ca

0xffffff9d7b93bd10 : 0xffffff7f8c7a459e

0xffffff9d7b93bd30 : 0xffffff7f8b7ae874

0xffffff9d7b93bd50 : 0xffffff7f8b85203f

0xffffff9d7b93bdd0 : 0xffffff7f8b6f850c

0xffffff9d7b93be90 : 0xffffff7f8b6c4ef0

0xffffff9d7b93bed0 : 0xffffff800a2a4a54

0xffffff9d7b93bf40 : 0xffffff800a2a45b5

0xffffff9d7b93bfa0 : 0xffffff800a21c557

Kernel Extensions in backtrace:[F8258F0F-61AD-30F4-BDD5-B18CCAAE535A]@0xffffff7f8b6bf000->0xffffff7f8b927fff






BSD process name corresponding to current thread: kernel_task

Mac OS version:


Kernel version:

Darwin Kernel Version 17.7.0: Mon Aug 31 22:11:23 PDT 2020; root:xnu-4570.71.82.6~1/RELEASE_X86_64

Kernel UUID: 92BEC910-BBAA-3192-BB57-39712C7D3342

Kernel slide: 0x000000000a000000

Kernel text base: 0xffffff800a200000

__HIB text base: 0xffffff800a100000

System model name: MacPro5,1 (Mac-F221BEC8)

Desperate to sort it out as it’s my primary workstation.

Thank you for your help!


macrumors G5
Jun 13, 2016
First kernel extension in the Panic Report backtrace is the NVIDIA one,[F8258F0F-61AD-30F4-BDD5-B18CCAAE535A]@0xffffff7f8b6bf000->0xffffff7f8b927fff, so, it's most probable that your NVIDIA GPU is defective.

Replace the GPU and test again.
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Reactions: bmoraski


macrumors newbie
Original poster
Aug 27, 2023
Hi there,
I replaced the GPU as per your advice but I am now encountering another problem.
I got a new sealed Gigabyte Radeon RX560 card which I am pretty sure is seated properly , the fans on the card do work when I switch the computer on. However, I get a black screen and the display doesn’t start.
I am pretty sure the card is fine. I have tried exchanging HDMI cables to no avail. Tried resetting the NVRAM but that didn’t help either….
I thought it might be a driver problem but I run high Sierra so it should be pre-installed isn’t it?
Is it that there might be some leftovers from the previous NVIDIA Gt120 card?
Thank you for your help !
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