I am connecting via a USB-C connector, but your experience might suggest that the problem exists within the 2019 Mac Pro, as opposed to the OS.

How are you connecting to the MacPro? I am using a USB 2-USB-C connector. It took a minute or two to show up but after that everything worked fine. You got me curious so I plugged my Mac USB Superdrive into my 2017 MacBook Pro running macOS 10.15.3(Catalina) and it came up no problem. I guess that since Apple no longer installs disc drives on their machines they assume that access to disc contained material is not a requirement. My only option at this point is to transfer the images from the CD/DVD's to an external SSD or HD via the new Mac's predecessor which runs High Sierra, and which will be an unnecessary and time consuming process. While this may represent a Mac Pro specific issue, I suspect that it is related to Catalina but have no proof of same. With the exception of the Super Drive, they all power up but do not show up on the desktop or by any other means of searching for their existence.

But even more disconcerting is the fact that I have tried no less than 3 different, brand new (one of which is USB 3.0) external CD/DVD drives and none of them have been recognized by the OS. I'd read reports indicating that Apple's own Super Drive would not work with the new Mac/Catalina and I can confirm that notion. Most, if not all of them have been ignored in recent years, but since the arrival of my new Mac Pro and the addition of a high capacity RAID array, I'd considered transferring those images to the RAID, with the hope that the images might someday become useful.

Over the years I have accumulated a large library of images that had been archived on CD's or DVD's. Allow me to begin by stating that I like my new Mac Pro, and have been using Macs since their inception, but.

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