Has anyone had this problem? Before I upgraded to Catalina from Mojave, the blu-ray burner showed up on the desktop and the sidebar. It also does not show up in Disk Utility. Under Finder, the boxes to show the CD, DVD drives is checked. I brought the iMac to the Apple store and they said the Blu-ray drive connector was defective, but on my older Mac Pro using Mojave, it shows up fine, so there is nothing
wrong with the connection cable. Also, it used to work fine before I upgraded to Catalina.