
I have not tried this using the Mojave drive in my Mac Pro that I started having this problem with, but, I believe that I would have the same result that I am having in the Mac Mini. I did contact OWC and they said that the Mercury Pro is completely compatible with the M1 Mac Min and Big Sur 11.3.1. If I try to mount it in Terminal, I get the message "Volume on disk6 timed out waiting to mount" In recovery mode, if I use Terminal, I can get it to mount using diskutil mount disk6 (in this case).Īfter coming back from recovery mode, Disk Utility can see the drive, but, it is unmounted.

When launched in recovery mode, I am able to see the CD and mount it and eject it in Disk Utility. I can't see the CD in Finder, Disk Utility, or, Music. On the M1 Mac Mini on Big Sur, I can see the Mercury Pro in System Information, but, I can get it to mount. The drive works with my Intel Mac Pro on High Sierra and my Intel MacBook Pro on Big Sur.

I've now added an OWC Mercury Pro optical drive. Like, if I uninstall Sophos and that was the bad software, will the CD likely to show up after a restart? How do I go about trying to figure out what software is interfering? Do I just uninstall things methodically? If I do that, will the CD eventually show up. When using the affected internal Mac mini system drive, I can see the optical drive in Terminal and Disk Utility, but, trying to mount it just times out after a while. Gracenotes found CD and song information. So, the optical drive works in Big Sur and can be recognized by Big Sur. I created an external Big Sur system drive and I can access the optical drive restarting from that drive. Now, I'm on Big Sur and still can't access the optical drive. I pretty much figured that it had to be a software problem, but, thought it was likely to be the age of my old Mac/Graphic card/Mojave. So.now I have a Mac mini M1 and, after Migrating my information over, to the new Mac, this problem has followed me.
