Computer not reading external hard drive mac

Once the process is complete, restart your Mac. Try reconnecting your missing drive once it reboots.

Computer Won't Boot

Some older drives require USB leads with separate power connectors. You can try switching out the cable for another and seeing if that makes a difference.

How to fix an external disk drive that won't show up on a Mac

You can confirm whether or not the drive is faulty by trying to connect it to another computer, if you have one. One potential solution is searching online for your particular brand and model.


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Manufacturers may have included Mac drivers as a separate download. If you have outstanding updates to apply, try applying them and trying again. In particular, some firmware updates relate specifically to peripherals and devices that connect via USB. Launch the Mac App Store app and head to the Updates tab.

Read More before installing major updates or upgrading macOS to the next major version. Even disk first aid or whatever the hell they call it now on the external drives? Read More for details relevant to your machine. It's called Apple Service Diagnostic, and we'll show you how to get it and use it for best results. Read More.

External Hard Disk Not Detecting In Windows [ Solved ]

If you have a problem with a particular USB port, you might want to invest in a hub to make the most of your remaining connectivity. It might also be time to start thinking about upgrading to another machine, since this could be indicative of bigger problems.

1. Connect Your Drive and Check /Volumes/

Not everyone safely ejects their drives, especially small USB flash drives used primarily for data transfer. Larger external hard drives that store a lot of precious data are more worthy of your patience, however. You can eject a drive in several ways:. Here are all your options for adding more storage space to your MacBook.

Why Can't I See My External Hard Drive Icon On My Desktop?

If the drive is showing here, but not on the OS X desktop, then click First Aid to try and repair the drive. If the drive is not showing up in Disk Management or Disk Utility at all, you have some other type of problem. Scroll down to the Not Showing Up section below.

You can get Windows to do it, but you have to purchase third-party software. The only other option is to format the hard drive and use the FAT32 format for the best compatibility.

How to access an external hard drive that's not showing up on Mac

If you see this message, it just means that Windows does not recognize the file system on the drive. Make sure you connect the drive to the appropriate operating system and backup any data that you might need before performing a format. The legacy format that is most compatible is FAT32, but it limits you to only 4 GB for max file size.

You can read my previous post on how to format an external hard drive using FAT If you need support for bigger files, then you should use the exFAT format. If you connect the drive to the computer and nothing happens, one of several things could be going on: Sometimes old drivers can cause a device to malfunction when connected to Windows. You can try fixing this by first going to the command prompt Start and type in CMD and running the following command:. Expand out Portable Devices , right-click on any items that are grayed out and choose Uninstall.

Restart your computer and try to connect the hard drive again. To prevent an external hard drive not showing up on Mac turning into an all-out disaster, always backup files on your system hard drive and in the cloud. Anytime you use an external drive, unmount the disk properly and store it safely. And finally, use CleanMyMac to uninstall apps and run regular Maintenance on your system to prevent applications conflicting with hard drive performance.

How to Get Your Mac to Recognize a Drive

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