A Western Digital external hard drive can be used on both Windows and macOS. and partition size limitations using the FAT32 file system (Windows and Mac). Format your removable flash drive to FAT32 with your Mac if you anticipate using the operating system. You can reformat disks in Mac OS X Yosemite using the Disk Utility in the Utilities folder. Insert a flash drive into your Mac's USB port . Many external hard drives come pre-formatted as FAT This is a native Windows file format that can be read by Mac OS X, but is not ideal for. Many people think it is hard to format the windows drive on Macintosh. No worry Now here is how to format your FAT32 external drive on Mac. Go finder. Use these steps to format external hard drives for both operating systems. To do this, you will need to use either exFAT or FAT32 formats. Why Need to Format External Hard Drive for Mac and PC; How to Quickly FAT FAT32 works with all versions of Windows, Mac OS, Linux. To format a USB Flash Drive to FAT32 in Mac OS X follow the next steps. Step2 . Search for Disk Utility in Launchpad and open it. So, if you've bought a USB drive that's formatted as Fat32, or any other You can , however, backup an APFS formatted disk to a Mac OS. To format USB to FAT32 with Disk Utility will erase all data on.