Reformat western digital for mac

broken image
broken image
broken image

The problem: When you try to reformat in Disk Utility, you’ll get a very cryptic error that says that there was an unknown error with the partition map. Of course, if you are using it with a Mac, then you’ll want to reformat it using Mac OS Extended (HFS+). When you buy a Western Digital (WD) 1 TB My Book External Hard Drive, they usually come formatted for Windows using FAT32.