Then you should be able to access and save new data on the drive again. Step 4. Rename the drive if you want and click "Erase" to confirm again.Īfter this, you can restart the Mac computer and reconnect your external hard drive. Step 3. Set the external hard drive as "Mac OS Extended (Journaled) next to "Format". Step 2. Select the external hard drive in Disk Utility and click "Erase" at the top pane. Step 1. Connect the external hard drive to Mac and open Applications > Utilities > Double-click to launch Disk Utility.
Also, if the external hard drive is still inaccessible after mounting, you will need to format the device for Mac compatibility. Bonus Tip: Format External Hard Drive for Mac CompatibilityĪs we have mentioned, that when the external hard drive file system is unrecognizable on Mac, it may not mount to Mac. Note: Remember to save your data to another secure location before making sure the external hard drive is secure to store files again.
EaseUS Data Recovery Wizard for Mac is able to scan and bring all existing data with lost files back from your external hard drive on Mac OS X and macOS systems.
It is caused by the mounting but the device itself.Īnd the best way is to apply professional Mac hard drive data recovery software to bring your saved data out of the device immediately. Theoretically, if an external hard drive becomes inaccessible after mounting on Mac with Disk Utility, something was wrong with your device. Restore Lost Data after Mounting External Hard Drive
If not, move to Part 3 and restore all lost and existing data from the external hard drive with ease. There, you are good to go and check whether you can access and use the existing data in your external hard drive again. Step 3. Select the untitled external hard drive and click the "Mount" button from the Disk Utility bar.Īfter this, you can restart the Mac computer and reconnect the external hard drive. (Untitled means unmounted on Mac computer.) You'll see that the external hard drive is greyed out, marked as untitled. Locate the external hard drive at the left panel under the External section. Step 2. Locate and double click "Disk Utility" to launch it. Step 1. Open a new Finder window, click "Application" and open "Utilities". When a storage device becomes unmounted as shown on this page, Disk Utility also assists mounting the device and fixing it back to a healthy state:
Mac Disk Utility is a professional tool that helps resolve most disk management issues on Mac, functioning similarly to Disk Management in Windows OS. You need to either get a repair or replace it as it might have failed and if it's totally crashed, there's not really much you can do at that point.
If the external hard drive icon doesn't appear below the External section, it means that there might be a problem on your drive.
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.