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PCIe SSD disappeared from Mac Pro 4,1


New Member
I have an early 2009 Mac Pro (running 10.11.6) and I've been using an Angelbird PCIe drive (MX2) as my main sample drive for about eight months now.

Last week, however, the drive disappeared from my desktop, and is no longer visible in recovery mode or in the list output of "diskutil list"

Anyone have any ideas on what I can do to make the drive accessible again?

Nick Batzdorf

My suggestions: try it in a different slot to see whether the problem is with the computer or (more likely) the drive. If you have one, try another PCI card in that slot too. And if you have another computer, try the drive in there.

My guess is that the drive went bad. It does happen. I had to replace a PCIe SATA 3 card under warranty.
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