When your Mac internal disk or external disk suffers from data corruption and damage, the first thing is to diagnose and repair it with Disk Utility. But Disk Utility can only get rid of some basic issues, such as hard disk structure damage, file system permission problem, etc. If your disk has bad sector, corrupted volume header or other serious problems,Disk Utility can't repair this disk and you will reminded to back up as many of your files as possible.

Since Disk utility is not sufficient to meet your advanced troubleshooting needs, you need more professional Mac disk repair software. Let's have a look at the list of several free Mac disk repair tools.
Free Mac disk repair software
There are a few free Mac disk repair software in the market. We can only find out three ones:
Disk Utility is an app that comes with your Mac. It’s tucked away in the Utilities folder, which is found inside the Applications folder, but is easy to locate using Spotlight - which you.
TestDisk
- Although Disk Utility is the default disk manager app built into macOS, it has limited functions when it comes to advanced partitioning. For example, it won’t work when you want to resize Boot Camp partition to arrange free disk space, or when you need to partition an.
- Another utility I use with iTunes is Airfoil Speakers, part of Airfoil. Airfoil is designed to let you stream audio from a Mac to all sorts of devices, and it is an essential tool for doing this task.
Mac OnlyX
AppleJack
Free Mac hard drive repair software can check and verify your Mac disk error. However, most of free Mac hard drive software is hard to use. TakeTestDisk and AppleJack for example, both of them need to input code to run the software. But unfortunately, common people know a little about command line. Moreover, you can't make sure that your data will be intact after using repair software.
Best free data recovery software - iBoysoft Data Recovery for Mac
The purpose of disk repair is to recover lost data from Mac disk and and make the drive usable again. Actually, free Mac disk software can't be sure of your data on the inaccessible drive. To avoid data loss, the best way is to recover lost data from inaccessible Mac disk with free Mac data recovery software and then reformat the drive.

iBoysoft Data Recovery for Mac is the best free Mac disk recovery software that can recover lost data from formatted, unmountable, inaccessible or even corrupted hard drive, external hard drive, USB flash drive, SD card. It recovers deleted or lost partition,recover deleted files even emptied from Mac Trash, etc.
Tutorial to recover lost data from Mac disk with best Mac disk data recovery software
Best Disk Utility Software For Mac Computer
Step 1: Download and install iBoysoft Data Recovery for Mac on Mac.

Step 2: Launch iBoysoft Data Recovery for Mac.
Best Disk Utility Software For Mac Torrent
Step 3: Select the hard drive where we want to recover lost data from and click 'Next' to scan all lost files.
Step 4: Preview the scanning results, choose files we need, and click 'Recover' to get them back.
Step 5: Have a check to ensure all lost files have been recovered.
Verdict
Best Disk Utility App For Mac
Data is always the most critical thing for people. So the safest and the most effective way is to perform data recovery at first and then reformat the Mac disk, whatever the disk has corrupted directory structure, damaged volume header, etc. iBoysoft Data Recovery for Mac can help you recover lost data from formatted, unmountable, inaccessible, unreadable or corrupted Mac disk. Just free download iBoysoft Data Recovery for Mac now!
Mac Disk Repair Utility
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