Internal SSD mounting intermittently since OS Sonoma upgrade (MacPro 2019)

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12 points

Internal SSD mounting intermittently since OS Sonoma upgrade (MacPro 2019)

I have 2 large 8TB SSD PCIe NVMe drives inside my 2019 Cheesegrater MacPro (both are OWC Accelsior 4M2 PCIe 3.0 M.2 NVMe SSDs).

They've worked beautifully.

I do music production and am slow to upgrade my OS. I wait until I am between projects and make sure all my music hardware and software is compatible. I upgraded from OS 12 to OS 14.7 Sonoma a few weeks ago.

Since then, one of my internal SSD drives has had three occasions where it is not there when I start up. So far, if I shut down and restart, it has re-appeared. This scares the beejeesus out of me and I've checked that my backups are solid.

Drive #1 and the Mac Pro were purchased in Dec 2020, so 4 years old. Drive #2 is 1 year old. The drives were close to $2000 each and I guess I was expecting them to last longer than 4 years?

What should I do?

Thanks much

Mac Pro, macOS 14.7

Posted on Oct 15, 2024 8:00 AM

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Answer 1

sempervirens Author

Level 1

12 points

Oct 15, 2024 5:18 PM in response to sempervirens

For anyone else looking for help, I got this reply from OWC:

"

Thank you for sending the SoftRAID report. I spent some time reviewing it and there is one thing that jumps out at me immediately. I see that you are currently running macOS Sonoma 14.7. macOS Sonoma had some bugs in it specific to NVMe drives connected to a Mac Pro via a PCI card. We published our findings and suggest that all Accelsior card owners upgrade to macOS Sequoia to resolve these issues. If you'd like to check out our article,

"

Some of my audio software isn't compatible with Sequoia yet so I'm a little stuck.

[Edited by Moderator]

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