Something strange hast just happened… I had to burn some files on a a DVD for a family member and so my 2012 Mac mini was happily doing this. Then when I looked at the screen, I saw - just for a second - the dialog one gets while opening a downloaded dmg file (the one where it basically opens the virtual disk). I could just read something like “Opening BaseSystem.dmg”.
Has anyone an idea what this was? I’m concerned right now that there might be some malware at play here…