External usb hard drive not detected mac

Why a flash drive is not showing up on Mac?

I lived with this I'm using a two-drive USB hard disk case. So I am just adding this answer for others that have the same situation. That may be all it takes to solve it for you like it did for me! That was how I discovered that my USB device was detected by the computer but advertised no storage units. Thank you for your interest in this question.

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The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Sometimes Mac doesn't recognise my external hard drive Ask Question. Asked 3 years, 1 month ago. Active 11 months ago.

How to access an external drive that's not recognized on a Mac

Viewed 58k times. What could be the problem? Remember, we're not there to look over your shoulder. Also, can you expand on the external drive as well?

1. Connect Your Drive and Check /Volumes/

What do you mean "restart several times"? Are you referring to the drive or to the MBP? Try this There's still lots of details still missing, Please reread the comments. There can be a number of reasons why your Macbook Pro won't recognize a drive. However, in Console, you can see that it is detected and an error is generated: When you attach your USB devices, have Console running and watch to see if the device is detected and whether an error is generated. First, see if they are listed.

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Your drive should be functioning again. Allan Allan This is really helpful, thank you. When I tried to eject my disk, it gave the message Volume timed out while waiting to eject. Nova - something could be causing it to be "busy" - an open file or a process is preventing it from ejecting. Try unmounting the drive instead of ejecting: sudo diskutil unmountDisk diskX It will still show up in diskutil, but you will be able to remove it without causing any issues.

External Hard Drive Not Showing Up on Mac? Here's How to Fix It

I've tried your suggestion but terminal hangs when it asks me for my password with sudo. Unmounting without sudo I get the same "Volume timed out" message. If you have time to take a look I provided more details in my own question, I'd really appreciate your advice!

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I had the same problem and I tried all the magic beyond this answer , I could not get My Passport WD to work light was ON but not blinking , I then simply "inserted" the USB3 very slowly in MBP and it works, its so weird; can not explain this phenomenon I also blew some air in both end of cable. I had similar problems, tried unplugging and plugging back in at least 5 times.

As always a reboot made the drive reappear, such an incredibly annoying issue. Formatting a drive erases all information and all partitions on the disk, leaving it ready for you to save and store information on. Partitioning your disk is a good idea when you have a need to run two operating systems at once on the same MAC. While not common for everyday users, it is more common for business users that have multiple programs across multiple platforms.

This makes the switch between each easier. Creating partitions on your MAC compatible drive is just as easy. Now what? In fact, it's very simple. When it comes to deleted files; that's exactly what you want. Free Trial Free Trial. Load AnyRecover and choose one of the six available options for data recovery, in this case we are choosing to recover data from an External, formatted and partitioned hard drive External Device Recovery.

Select one and continue. AnyRecover takes a moment to scan your disk and search for the specified file type to recover. Don't miss the opportunity to get AnyRecover license at the lowest price on the market.

Don't know how to apply it, check the instructions here:. What if my files were not found? Fear not. We can take this a step further. And select All Around Recovery.