You can use Time Machine or another backup tool. You will wipe all the data from the disk when you reformat it, so you must back up the drive before you begin. This is the most critical step in the process. However, if you need to do it, here’s what you should do. You can download it for free here.Īs we said in the introduction, this is very much a last resort. Its Maintenance module can repair disk permissions, free up RAM and run maintenance scripts to fix performance issues on your Mac. CleanMyMac X’s System Junk tool can get rid of old junk files that might be affecting your Mac performance. If you have problems with your Mac that are causing it to crash, you may not need to reformat. If the problem is preventing the Mac from booting or causing it to crash or perform erratically, reformatting and reinstalling macOS might be the only answer. The main reason why you may need to reformat your Mac is if the startup drive has developed a problem that Disk Utility or a third-party disk management tool can’t fix. Why you may need to reformat the hard drive on your Mac If you’re reformatting a USB stick or portable hard drive, you may want to use APFS encrypted to protect your data if the drive is lost or stolen. If you’re using it as your Mac’s main drive, APFS is the best choice as it has replaced Mac OS Extended as Apple’s preferred file system for macOS. When you reformat a drive, you can choose which file system to use. For Macs, that file system can be HFS+ (Mac OS Extended Journaled) or APFS (Apple File System).
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December 2022
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