DVD's can't play since yosemite update
Super Drive and USB peripheral dvd drive both quit working since update to Yosemite. Clean and unscratched dvd's that play in other devices. Drive spins up then slows down, repeats that about 10 times until it give up and ejects the disk. The drive are accessible in Disk Utility, but no options to repair. Has button to eject etc.
Built-in Super Drive and USB DVD drive both act the same way. The usb drive works on other computers not running Yosemite.
Tried installing the old DVD firmware update that is on the Apple website, but the installer said it is not compatible
Installed all of the Apple software updates
Running a 23" iMac from 2008. Internet search indicates that others with the problem have similar vintage iMacs, 2008 to 2010
Best Regards,
Ellkabong
iMac, OS X Yosemite (10.10.5)