To format a hard drive before you start using it in Windows, use the Disk Management utility; on a Mac, use Disk Utility.

If you have to use a flash drive on both Macs and Windows PCs, make sure both systems can read it. Here's how to format the drive correctly.

While the Mac can use a hard drive formatted for Windows, some features may be limited. So it's a good idea to format a new hard drive specifically for macOS.

To solve this performance problem, macOS Tahoe introduced a new disk image format, Apple Sparse Image Format (ASIF).