Recover Files from External Hard Drive Not Recognized Mac Sierra

At some random occasions, your Mac Sierra may not recognize your external hard drives. This situation occurs when after you initially eject the drive and unplug it from your system. But when you try to plug in the external hard drive again, your Mac Sierra did not recognize it. In general, the only way to resolve this issue is to remove the external hard drive and then restart your Mac Sierra to show the drive. If the problem still persists, there then you can follow the below-mentioned steps:

Solution 1:

Go to Settings > Finder Preferences. Under the General tab, select the external hard drive in “Show these items on the desktop”.

Solution 2:

Go to Disk Utility and select the external hard drive. Choose verify disc. It will find and correct minor errors.

Solution 3:

If you are connecting the external hard drive with Mac Sierra using USB Hub, then check the USB Hub first.

Solution 4:

From the Finder menu, choose “Go to Finder”.

Type external hard drive path (i.e. /Volumes/selectdisk)

Solution 5:

External hard drive not showing up in Finder but visible in Disk Utility?

Then go to Finder window and view below the favorite list. If the drive greyed out? Select the external hard drive. It might be now visible.

Solution 6:

  • Shutdown your Mac Sierra.
  • Unplug the power chord.
  • Unplug all USB connections.
  • Wait for sometimes then plug it back in.
  • Now, turn on your Mac Sierra.
  • Plug the external hard drive only to the USB port. Now, open the Finder and check the external hard drive.

Solution 7:

Install and run Onyx (maintenance freeware) or run and restart your Mac Sierra.

Solution 8:

  • Sometimes this issue might happen due to unsupported drive format. 
  • Install Fuse for OS X, NTFS-3G for Mac Sierra and Fuse wait.
  • Now, restart your Mac Sierra system and check the issue.

When you are following above-mentioned methods, it might be possible that you may lose files from the external hard drive not recognized Mac Sierra. So, in such situation, you can opt Drive Recovery Software which is capable of recovering files from an external hard drive not recognized on Mac Sierra. For more details, you can visit this link:

Significant Features of Drive Recovery Software:

  • Recover files lost after being deleted or formatted from MacBook Pro, Air, Mac Mini, iMac, and others.
  • All editions of Mac OSX are fully supported by this utility.
  • With the help of this software, you can also recover data from pen drive, SSD, FireWire drive, memory card, etc.
  • Recover files from an external hard drive not recognized Mac Sierra without modifying or altering the original content.
  • Provides a preview option to view the recovered files before saving them.
  • It recovers data from various brands of the external hard drive such as Iomega, Samsung, Seagate, Western Digital, Hitachi, LaCie, Maxtor, etc.

Steps for recovering lost data from not recognized external hard drive on Mac OSX Sierra

Step 1: Run the Drive Recovery Software on your Mac Sierra machine and connect the unrecognized external HD to it. On the main screen, choose Recover Partitions option. Select the external drive from the list of available drives. Click on the Scan button.

Drive Recovery Software - Select Recovery Mode

Figure 1: Main Window

Step 2: The software then starts to scan the external HD for the data.

Drive Recovery Software - Select Drive

Figure 2: Scanning for Files

Step 3: The preview window appears at the end of the scan process. Check for your data under File Type View and Data View layouts.

Drive Recovery Software - File Type View Recovered Files

Figure 3: Recovered Files

Step 4: You can preview the recovered file items and mark them for saving.

Drive Recovery Software - Preview Recovered Files

Figure 4: Preview

Step 5: You can save the files regained from the external HDD to any location only if you are using the licensed version of the software.

Drive Recovery Software - Save Recovered Files

Figure 5: Save Recovered Files

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