Home > Questions

Unable to mount external hard drive

I have a MacBook Air (Retina, 13-inch, 2018) running MacOS Catalina 10.15.4. While I connect an external USB hard drive, the MacBook Air does not mount it. When attempting to mount it in Disk Utility, it returns: Could not mount "disk2s2". (com. apple.DiskManagement.disenter error -119930868.) But the MacBook Air still cannot mount it. Any suggestions on how to repair and mount this external USB hard drive so I can copy its contents off? Thank you.

Best Answered by

iBoysoft author Eudora Liu

Eudora Liu

Answered on Monday, July 10, 2023

As you say, your external USB hard drive cannot mount on your MacBook and you try to fix it with Disk Utility but not work. At this time, you can try to recover your data from an unmounted external hard drive. iBoysoft Data Recovery for Mac can give you a hand.

iBoysoft Data Recovery for Mac can help you to recover your data such as files, photos, videos, etc. from unmounted external hard drives. And it is compatible with the T2 chip, M2, M1, M1 Pro, and M1 Max and supports macOS and Mac OS X.

Step 1: Free download and open iBoysoft Data Recovery for Mac.

Step 2: Choose your external hard drive and click Search for Lost Data.

Step 3: Find and preview the search result.

Step 4: Click Recover and choose a location to restore your data.

Step 5: Check whether you get back your data.

And now you can format your unmounted external hard drive. Here's how:

  1. Connect your external hard drive to your MacBook.
  2. Go to Launchpad > Other > Disk Utility.
  3. Choose the external hard drive and click Erase on the top.
  4. Type in the disk name and select a format and a scheme.
  5. Click Erase to start the process.
  6. Click Done after finished.

After that, try to mount your external hard drive again to check if the problem is fixed.

Or else, you can try the following ways to do some simple checks.

  • Re-plug your external hard drive to another USB port or try another USB cable.
  • Try a super slow jam.
  • Check your Finder Preferences.

People Also Ask

Read More Questions

Read More Advice From iBoysoft's Computer Experts

Discord bloqué sur la vérification des mises à jour sur Mac

Résolutions pour Discord Bloqué sur Vérification des Mises à Jour sur Mac

Ce post présente quelques méthodes efficaces pour résoudre le problème de blocage de Discord lors de la vérification des mises à jour sur Mac.

Wiederherstellungsmodus auf dem Mac funktioniert nicht

Mac Recovery Mode Not Working, Was tun? (Vollständiger Leitfaden 2023)

Informationen zur Behebung des Problems, dass der Mac-Wiederherstellungsmodus nicht funktioniert. Und Hilfe beim Wiederherstellen oder Neuinstallieren von macOS, wenn der Mac nicht in den Wiederherstellungsmodus startet.

Tipps zur Mac-Datenwiederherstellung

Image Capture Not Working or Not Recognizing iPhone

[Fixed] Image Capture Not Working/Not Recognizing iPhone

This tutorial offers five ways to fix Image Capture not working/not recognizing iPhone.

News Tips