Question: CD not mounting and 100s of CIBD files created
Mac mini late 2012
2.6 gHz, i7.
Until recently I was able to use an external DVD/CD drive without problems - not an apple superdrive; an LG in fact with two USB connections to provide sufficient power.
These last few days itunes has been unable to read a CD when inserted in the drive.
The symptoms are strange; the drive is spinning but the CD icon on the desktop flashes, so does the CD icon in itunes. When I look in disk utility I see the same flashing (grey-not grey) icon for the CD. For one user account (admin) it normally works but with a second user (also admin) it does not.
When I looked in activity monitor I have seen, a couple of times, a process called "disk arbitration" running, it was pulling a large portion of the CPU. At times the finder has been consuming 100% of the CPU as well.
I also see that, in the library preferences directory there are literally 100s of .cibd files being generated: see image if I have succeed to attach it. I have the impression that the system is repeatedly logging the CD and making a new file, which is odd because I think there should be only one.
I have tried deleting the preference files for finder and itunes for both users, to no effect. I have zapped the pram, reset the SMC and restarted several times. For the second user I see an occasional message that the Mac is being optimised at the moment.
The problem has appeared from nowhere, at the moment it is inconvenient but I am concerned that this is symptomatic of a larger issue.
Any ideas anyone?
Mac mini, macOS High Sierra (10.13.3), m. mini late 2012 2.6 gHz,i7,16gb