... : NTFS / FAT32 /HFS+ (also known as Mac OS Extended)Pre-formatted File System: FAT32Buttons and Slots:-Power ON ... Vista, Windows 7, Mac OS 8.6, Mac OS 9.2, Mac OS 10.1.5, Mac OS 10.2, Linux 2 ... limits the partition sizes to 32GB maximum.For Mac OS X, we recommend formatting the drive using HFS+ ... to batch, but guaranteed minimum specs as above.All OS's listed as compatible were tested with 32 bit versions ...