Overview of Western Digital My Passport Ultra.My Passport for Mac portable hard drive, with the WD Security and WD Drive Utilities software USB 3.0 cable Quick install guide Optional Accessories For information about optional accessories for WD products, visit Operating System Compatibility Your My Passport for Mac drive and the WD Drive Utilities and WD Security. Format WD My Passport Using Software (Free). Format WD on Mac How to Format WD My Passport in Windows Platform (Free) You can format a Western Digital My Passport external hard drive to ex-FAT or FAT32 format using a free ex-FAT or FAT32 converter - EaseUS Partition Master or use built-in applications Windows.