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". In its place would be "disk0s2." It is this indented entry that you want to erase.Check external hard drive cable, the USB port on Mac, and its state in Disk Utility. You might see that it is displayed on the list as: To be sure you do this right, please observe that the drive may appear in the list as ghosted because it is unmounted. Use the device reference in this next command. It will appear similar but not the same as this: /dev/disk0s2. In the output, you should find your Fusion drive listed. At the prompt paste these lines individually pressing RETURN at the end of each line. If that doesn't work then quit Disk Utility and open Terminal from the Utilities' menu. After doing that click on the Unmount button in the toolbar to see if the disk disappears from the Desktop. Try repairing the disk in Disk Utility using First Aid.
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