3 Best External Hard Drives for Storing Photos.My problems is that I cannot even see the WD Hard Drive on the Mac 'Finder' nor on the PC's 'File Explorer' The Hard Drive simply disappeared from both after I had re-formatted it to exFAT using the PC to do this having gone into the 'Properties' of the WD Hard Drive. Thank you for your response Monicabang - much appreciated.Here are three ways to format a WD My Passport, follow any one of them to convert to FAT. If you want to share digital files between Mac and Windows system easily, you must convert WD My Passport to FAT or exFAT. That is to say, only FAT32 and exFAT can work on both Mac and PC. In addition, the ReFS file system was developed as a new generation file system for server computers starting from Windows Server 2012. FAT was inherited from old DOS and has exFAT as its later extension. While Windows employs two major file systems: NTFS and FAT. macOS supports a handful of common file systems - HFS+, FAT32, and exFAT, with read-only support for NTFS. How To Format My Passport External Hard Drive For Mac Driveīefore you get the answer, you must figure out what kind of file system can work well on both the macOS and the Windows system.