Replace with the identifier of the volume you want to repair (see Step 1).Īs soon as you hit enter on your keyboard, diskutil will attempt to repair the volume and report back to you when it’s done. To repair a corrupted volume, paste in the following command into Terminal: Step 3: Use DiskUtil to Repair the Hard Disk The corruption could spread to other files and make them unavailable at the worst possible moment. However, don’t skip the repair entirely because it’s not safe to use a corrupted hard drive without repairing it first. If you discover that your data is safely backed up elsewhere, you can approach the repair without any worries. Step 2: See If You Have a Backupīefore you attempt to repair the corrupted volume and recover files from it, look out for a backup of your data. However, if it says something like “The volume Macintosh HD was found corrupt and needs to be repaired,” then you need to proceed to step 2 or 3 of this guide. If it says something like “The volume /dev/rdisk3s1 appears to be OK,” the hard drive, partition, or volume in question is most likely not corrupted. Wait for the verification process to finish and carefully read the last few lines of text in the Terminal window. If you want to check only your main hard drive, you can write a slash (/) instead of the identifier. Make sure to replace with the identifier you’ve just written down. In the same Terminal window, paste in the following command: When you find it, write down its identifier because you will need it in the next step. Look at the size of each partition and use it to find the one you want to verify. You should see a list of all your hard drives and their individual partitions. Launch the Terminal app (located in the Utilities folder) and paste in the following command: The good news is that all the tools you need for the job are already present on your Mac. The first thing you should do when you start to suspect that your hard drive has become corrupted is to verify your suspicion.
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