Luckily, Apple includes a handy tool you can use to repair your Mac: Disk Utility.The latest software included: Active KillDisk 13, Active Partition. If you have multiple storage devices connected to your Mac, make sure you select a volume that’s on the device you want to partition.You might need to repair your Mac disk if your computer won’t start up, apps keep freezing, you can’t open certain documents, or the performance has slowed to a halt. If Disk Utility isn’t open, click the Launchpad icon in the Dock, type Disk Utility in the Search field, then click the Disk Utility icon. In the Disk Utility app on your Mac, select a volume in the sidebar, then click the Partition button in the toolbar.
![]() This is because you can’t repair the startup disk while your Mac is using it to run macOS. Boot your Mac into Recovery ModeIf you need to repair the startup disk on your Mac, you’ll need to boot into Recovery Mode first. Unfortunately, in this case, you’ll need to rely on any pre-existing Mac backups — if you have one. For this reason, we strongly urge you to back up all the data on your Mac before starting.If problems with your disk prevent you from booting up your Mac, you won’t be able to make a backup first. Partition Tab Disk Utility Greyed Out For External Hard Drive Password To LogKeep holding both keys until the macOS Recovery screen appearsIf recovery mode doesn't work, there might be a simple fix, but it could also indicate a hardware problem. Restart your Mac by pressing the Power button, then immediately press and hold Cmd + R If prompted, use an administrator password to log in to your user accountHow to boot into Recovery Mode on an Intel-powered Mac: Now restart your Mac by pressing the Power button, but keep holding the button down until you see a page of startup options appear Shut down your Mac and wait for it to finish powering off Beneath your Mac model name in the window that appears, it should say either Chip (for Apple Silicon models) or Processor (for Intel models).How to boot into Recovery Mode on an Apple Silicon Mac: ![]() When you’ve finished repairing all the disks on your Mac, go to Apple > Restart from the menu bar and restart your MacWhat to do if Disk Utility can’t repair your Mac diskWhen the First Aid process is finished, you’ll see a report telling you if it was successful or not. When First Aid is complete, click Done and repeat these steps for the next volume, container, or disk You may need to enter your administrator password If you can’t see a Run button, click Repair Disk instead. Emulator mac computerFormatting a disk erases all the data from it, which is why it’s so important to make a backup before starting this process.If you’re happy to erase your data, follow this guide to format your disk and reset your Mac. Format and erase your diskWhen First Aid can’t repair a disk in your Mac, you might need to reformat it to get it working again. If that fails, try using a different cable, port, or even a different Mac. This can happen if the cable isn’t pushed in all the way, if there’s fluff in the port, or if there’s damage to the cable, port, or drive.Shut down your Mac and unplug all the unnecessary accessories, then test the cable and port for your drive using a different device before trying to repair it again. If using an external disk, check the connectionYou might be unable to repair the disk inside an external drive if your Mac doesn’t have a good connection. But on occasion, First Aid might spit out a list of unfixable errors with your Mac disk instead.Luckily, there are still a few Mac disk repair tricks you can use when this happens. Change acrobat for mac highlight colorThis might be the result of liquid damage or a hard knock, but disks can also stop working as they age over time.If the Mac disk repair instructions we gave above haven’t helped, it’s time to look at a hardware repair instead. Here are some of the most popular disk repair apps available:If all else feels, seek a physical repairIt’s entirely possible that you’re experiencing problems with your Mac because of a physical problem with its disk. Use a third-party disk repair appWe already explained how MacKeeper can fix other issues that look like disk problems, but if that doesn’t help, there are other third-party apps you can use to repair your disk if Disk Utility fails you.Most of these apps come at a premium price, but if it’s between that and losing your data, you might want to give them a go.
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