USB Optical Drive no longer recognized.

I have a known good USB SuperDrive (model HL-DT-ST DVDRW
GX50N) that works fine with High Sierra on both my iMac and MacBook Pro. I recently installed Mojave on both and neither will recognize the drive. When connected and a disc is inserted, the "Open Finder" prompt is displayed but if I select Open in Finder, nothing happens. I can eject the disc just fine, just not see it in Finder. It does appear in System Information under both Disc Burning and USB. Same on both machines. I can hook the SuperDrive up to MacBook Pro running High Sierra and all is well with the drive, i.e. I can read and write to the media inserted.

Any ideas? Hopefully operator error and I looked over something simple.