2013 Mac Pro 2.7 Ghz 12 core with Mojave 10.14.6 Keeps Rebooting with CPU Machine Check Architecture Error Dump

What version of MacOS are you running?

Do you still have the old genuine Apple SSD module? There are reports of problems with firmware on these machines, and anecdotes suggest your Mac will not update the firmware if it has the Aura installed. But putting back the genuine Apple SSD would allow you to update the software, and the firmware would install along with it.

The trouble free version is version 132.0.0.0, yours is:

Model: MacPro6,1, BootROM MP61.0124.B00,

12 processors, 12-Core Intel Xeon E5, 2.7 GHz,

64 GB, SMC 2.20f18

Talk to the Aura experts at OWC and see what can be done for this.

You need to be assertive and not get brushed off by their first responders -- you need someone with detailed expertise about the Aura upgrades.

Grant lists your Mac has having firmware version

Model: MacPro6,1, BootROM MP61.0124.B00,

12 processors, 12-Core Intel Xeon E5, 2.7 GHz,

64 GB, SMC 2.20f18

But the newer firmware version numbers look more like this

132.0.0.0

This might suggest your Mac has the older firmware still - possibly because it was not able to update it due to your having an Aura SSD now. I can however confirm that the Xeon E5-2697 2.7GHz is suitable for your MacPro6,1 model.

I would suggest you get hold of an external USB or Thunderbolt drive, format it, install Mojave 10.14.6 on to it and let it boot from it. This should hopefully succeed in also updating your Mac Pro firmware to the very latest version. You can then try switching back to booting from the SSD and trying that again.

I have found that the recent macOS installers require the internal drive to be partitioned as GUID with MacOS Extended (Journaled). I've seen numerous reports where macOS will not update the system firmware if a third party SSD is installed in a Mac using a PCIe SSD such as your Mac Pro.

Some of the OWC Aura SSDs have a firmware update available to help address this issue (I think). I believe the link to the firmware update is found on the OWC Blog instead of the OWC support site.

https://eshop.macsales.com/Service/Knowledgebase/Article/10/730/Aura-SSDs-Firmware-Update

The page says it is not for the Mac Pro 2013, but I've seen users report updating the SSD firmware on the Mac Pro. IIRC, the SSD in this Mac Pro is the same one found in the MBPro 2013+ laptops so the firmware should apply to it as well. Perhaps the reason has to do with something specific to the MacPro which might cause it to fail.

HWTech wrote:

I have found that the recent macOS installers require the internal drive to be partitioned as GUID with MacOS Extended (Journaled).

That makes sense because of the way MacOS installs major upgrades. A minimal bootable partition is set as the Startup Drive, containing the new software or firmware, then a Restart means your Mac comes up running the minimal installer.

For the slightly older Mac Pro 21010 and 2012 models, all the firmware updates are included in 10.13.6. if you install that one, you are more likely to get the firmware update you need.