mac first aid volume could not be unmounted

Check if the external hard drive is visible.

Open Disk Utility by opening new Finder windows > Applications > Utilities > Double-click to bring up Disk Utility.

If your external hard drive is another recognizable format, reformat it to a readable file system for Mac.

Mac computer can read HFS+, NTFS, FAT32, exFAT, and exFAT. If the external hard drive shows up, congratulations. Switch USB portĬhange a USB port and reconnect the external hard drive. If it turns out the drive connection cable is damaged, replace one and your problem is resolved. If not, re-plug the drive and reconnect it to Mac. Also, check if the external hard drive is probably plugged in the Mac computer via its connection cable. Check the cableĬheck if the external hard drive cable is plugged in correctly, not loose. Check External Hard Driveīefore you start to fix the external hard drive unmounted error, you should first check the external hard drive, finding the real cause of the device unmounted error.įollow through the checking tips here and find out the problem: # 1. You can follow to resolve the same issue on your own now. Here we'll take the unmounted external hard drive as an example to show you how to force the unmounted external hard drive show up on your Mac desktop without losing any data. Have you ever met this problem that you tried to open an external hard drive on your Mac computer but the disk displayed as unmounted? If yes, you are in the right place. If Mac is not compatible with the drive format, use Disk Utility to erase it to Mac OS Extended.

If you lost drive data, run EaseUS Data Recovery Wizard for Mac to bring it back. Open Disk Utility > Select the unmounted external hard drive > Select 'Mount'. Check external hard drive cable, the USB port on Mac, and its state in Disk Utility.

Mac first aid volume could not be unmounted