I was refering to the Apple II 5.25" drives on the Mac. Didn't think about the IIGS 3.5" drive. Sorry!You can use the 3.5" 800K external drives on Macs with no problems at all, I have used such a drive with both my Plus and IIGS. I don't think the 5.25" drives will work on Macs though.
Make sure you use either the "Apple 800k drive" or the "Apple 3.5 Drive" and NOT the "Unidisk 3.5".The 800K drive will work fine on compact Macs. The 140K (5.25") drive will either kill the Mac, the drive or both.
ANY of the Apple 800K drives will work fine on a Mac.The Unidisk is not Mac compatible.The 800K drive will work fine on compact Macs. The 140K (5.25") drive will either kill the Mac, the drive or both.