Mac Pro 5.1 Early 2009 Kernel Panic after login Mac OS Mojave

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Mac Pro 5.1 Early 2009 Kernel Panic after login Mac OS Mojave

Hello Everyone,

I recently bought a used Mac Pro flashed from 4.1 to 5.1.

I bought it with the original 512 MB Graphics Card and replaced it with the Mojave compatible Sapphire Radeon RX580 Pulse 8GB.

Panics happened already in High Sierra with the Original Graphics Card.

Clean install panics as well.

Installed Mojave on NVMe -> panics during installation, and right after login. (bootrom is 144.0.0.0.0)

Booted mojave from Hard Drive -> panics from 1 to 5 min after login .

the only panic report I could copy is the one down below, which is the one that happened when booting from HD.

NVRAM, SMC reset didn't result in anything different.

Firmware upgrade as well.

Safe Mode panics happened as well both booting from HD and NVMe.

I don't know what to do and I'm looking for help before I spend anymore money on this device.

Thank you very much for any help you can give me.

Panic

Mac Pro

Posted on Dec 23, 2019 9:38 PM

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Answer 1

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ghavi Author

Level 1

4 points

Jan 12, 2020 6:48 PM in response to ghavi

Sorry for the late answer. It was my first post and I didn't realise I wasn't following the thread.

Anyway The problem was with one DIMM. I took it off it and it's running properly now.

The panics were happening with both mechanical HDD (High Sierra) and

NVme (Mojave). On High Sierra it usually ran for around 10 min longer

though.

I coudn't boot to AHT in any way. I didn't try it after I took off the DIMM though.

Thank you all for helping me out!

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Answer 2

BDAqua

Level 10

239,969 points

Dec 25, 2019 6:22 AM in response to ghavi

Only clue I can see is...
  Kernel Extensions in backtrace:
         com.apple.driver.AppleIntelCPUPowerManagement

The 2009s were pretty famous for broken plastic CPU clamps, any CPU LEDs lit on the board?

https://www.ifixit.com/Answers/View/582545/Mystery+CPU+Diagnostic+Light

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Answer 3

Dec 25, 2019 8:21 PM in response to ghavi

Power Management routine is the messenger, not the problem. All such stuff gets discovered in CPU power management, because that is where the checks for these issues are located.

Machine check is a Hardware-related problem in most cases. This is a multi-processor cooperation problem, with processors not responding to Interrupts. but these were supposed to have been solved if your software is completely up-to-date.

The broken plastic pins are on the Northbridge chip, which first gives you wonky problems, then constant panics for addresses out of bounds and page faults, and illegal addresses. When those pins are busted, the Northbridge chip gets crazy hot, like100 C, which can be seen with a temp monitoring program.

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Answer 4

ghavi Author

Level 1

4 points

Jan 12, 2020 7:09 PM in response to Grant Bennet-Alder

I tried to boot to AHT multiple times, unsuccessfully.

After some PRAM and SMC reset I got a chime loop, which wasn't happening before.

So I took all DIMMs out and booted only one at a time.

The Problem was with the DIMM in slot 1:

Memory Module: DIMM 1, 16 GB, DDR3 ECC, 1333 MHz, 0x802C, 0x33364B534632473732505A2D314734453120

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Answer 5

BDAqua

Level 10

239,969 points

Dec 26, 2019 6:06 AM in response to Grant Bennet-Alder

Thanks Grant. :)

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Answer 6

Jan 12, 2020 6:54 PM in response to ghavi

How did you find out that it was a DIMM problem, and which DIMM?

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Answer 7

BDAqua

Level 10

239,969 points

Jan 12, 2020 7:06 PM in response to ghavi

Thanks! :)

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Mac Pro 5.1 Early 2009 Kernel Panic after login Mac OS Mojave

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