In this blog post, we discuss why your external hard drive may have problems getting detected on Mac OS Mojave. You will also learn about simple solutions to resolve this problem.
Case 1: Connection issues
Before we conclude that the issue is really with Mojave, we must see if the hard drive not detecting issue is related to connectivity problems. To do that, restart your Mac and reconnect the external hard drive. Then check if it works. If it does not, then connect the hard drive to a different port and check. You can also change the connector cable to make sure the issue is not coming from the cable. If none of these workarounds help, proceed to the next step.
Case 2: Incorrect Preference settings
It is possible that preferences have not been set to make the external storage device visible in Finder.
In order to resolve this problem, you will have to make the drive visible. To do so, go to Finder > Preferences, click on the Sidebar tab and then check External disks.
Case 3: Use Safe Mode
Safe Mode usually can resolve problems by removing cache and also prevents unnecessary applications from opening on startup. To enter Safe Mode, turn ON your Mac with the Shift key held down.
If you’re Mac opens normally in Safe Mode, then boot into normal mode and connect your external hard drive. If you still have problems, move to the next solution.
Case 4: File system incompatibility
It is also possible that your external hard disk is not being read because it has an incompatible file system. For instance, Mac OS cannot recognize drives formatted with NTFS, Ext 4, Ext 3 or Ext 2. In that case, you can connect the hard drive to a Windows computer (for NTFS) and Linux (for Ext 2, 3 and 4) to check if it is detected.
If it works on other machines, then you can backup data on the drive and format it using a file system like ExFAT which is compatible with both Mac and Windows.
Case 5: Corrupt file system
It is possible that the file system in the hard drive is corrupted due to improper handling of the device, hardware failures or logical errors. In some cases, such corruption issues can be repaired using the First Aid feature in Disk Utility. To use First Aid, click on the Apple menu and select System Preferences. Then click Disk Utility and select the external hard drive from the list of drives. Next, click First Aid to fix corruption issues.
If none of the above fixes help you solve the problem and your hard drive is still not recognized, then it is possible that the drive is damaged. In that case, it is best to recover data off the drive using Remo Recover data recovery software and replace the drive. It is probably not worth risking your valuable data with this drive.
Recover data using Remo Recover
As far as data recovery is concerned, Remo Recover is an excellent choice as it is capable of recovering data from damaged drives in the same form and structure as it was originally. It can recover data from hard drives, SSD’s, IDE, USB flash drives, iPods, FireWire devices, etc. The tool offers a simple interface to make data recovery simple for all kinds of users irrespective of whether they have a technical background.
You can also use the tool to recover data from corrupt Mac volumes and drives. There is also a Windows version available with support for all the latest Windows versions.