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MP All Models PCIe SSDs - NVMe & AHCI

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The first post of this thread is a WikiPost and can be edited by anyone with the appropiate permissions. Your edits will be public.
Flávio Medeiros 1983 said:
I've done that already, now i have only Mojave on Bay 1, nothing else...

The thing is what to do next... Its safe to try reinstalling OC on Bay 2 and Monterey on one of the Samsungs?

Maybe this time i could try to place the oc EFI folder inside the nvme (boot drive)?
Click to expand...
Maybe take a step down and install Big Sur or Catalina on the nvme?
 
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Problem solved! I dont known why but after installing Monterey on the Samsung 960 evo and using Migration Assistent to transfer account, apps and data from the sata SSD install via USB/sata adaptor everything is working perfectly now...
 
I run Samsung 970 Evo Plus NVMe boot. Have three different MacOS's installed running off the same Drive, with OCLP on it.
 
basslik said:
I run Samsung 970 Evo Plus NVMe boot. Have three different MacOS's installed running off the same Drive, with OCLP on it.
Click to expand...
I also have a Samsung 970 Evo Plus installed using the specific adapter. I've installed Windows 11 only on it, no OCLP, but I'm having some issues with sleep mode. I can't figure out if the problem is the SSD or the GPU drivers.
 
ginopilotino said:
I also have a Samsung 970 Evo Plus installed using the specific adapter. I've installed Windows 11 only on it, no OCLP, but I'm having some issues with sleep mode. I can't figure out if the problem is the SSD or the GPU drivers.
Click to expand...

You didn't wrote if this is for a MacPro5,1 or MacPro6,1.

For the former, installing UEFI Windows without OC/OCLP disabling Windows Secure Boot signing of the MacPro5,1 BootROM is a extremely bad idea, the corruption of the NVRAM volume of the BootROM will gonna kill your backplane.

Sleep is one of the first things that stops working correctly the moment the NVRAM volume inside of the BootROM starts to become corrupt.

If you have the MacPro6,1, did you replaced the RTC BR2032 battery? Check the voltage with the testpoints:

forums.macrumors.com

Mac Pro won't turn on

Any screw nearby, see the image below, is connected to the GND plane and can be used as ground for your black multimeter tip.
forums.macrumors.com forums.macrumors.com

forums.macrumors.com

Mac Pro 6.1 Monterey - Crashes in Sleep

There are test points for the RTC battery on the I/O board: Use the screw as the GND. You can download the service manual here: https://forums.macrumors.com/threads/mac-pro-cylinder-led-diagnostics.2231524/post-28409835
forums.macrumors.com forums.macrumors.com
 
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The BR2032 battery is hard to find and quite expensive. For now I’ll keep it as it is, as soon as I manage to find one at a reasonable price, I’ll replace it. Thanks
 
ginopilotino said:
I'm in Italy. From RS‑Online it costs about 20 euros, including shipping
Click to expand...
Still worth it I think.
I changed my original battery after 12 years (I can’t remember ever changing it before… 🤔), it wasn’t even showing any issues but thought I would replace anyway, but my cMpro never gets shut down, only sleeps.
 
The case in Australia gets weirder, remembering last time i bought one - they're not offered in the local market as a retail product, and it's illegal to sell coin cell batteries that aren't in tamper-proof / child proof retail packaging. It required a special order from a local battery supplier, who had to call up to the official distributor to get special dispensation to supply one to me.
 
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