
Don’t Format the Drive! (Yet) When you connect a Mac-formatted drive to Windows, you’ll be informed that “you need to format the disk in drive X: before you can use it.” Don’t click the “Format disk” button or Windows will erase the contents of the drive–click “Cancel”! Resetting a Mac to factory settings involves erasing the Mac hard drive and then reinstalling MacOS or Mac OS X system software onto the computer. You’re changing the format of a disk, such as from a PC format (FAT, ExFAT or NTFS) to a Mac format (APFS or Mac OS. This is one of the final steps before selling, giving away or trading in your Mac. You want to permanently erase all the content from your Mac and restore it to factory settings.
