On the Mac you can change the DVD region code 5 times after which no more changes are “allowed”. There’s something fundamentally wrong with hardware that disables itself. Or hardware that essentially dictates to the owner (the owner!) what it can be used for. Anyway, some searching turns up the means to reset the code. The below applies to Pioneer drives. My Mac has a Pioneer DVR-117 drive there’s seems to be no specific firmware for this drive downloadable on the net but some searching on the forums makes it clear that we can use the DVR-108…