Seagate External HDD won't show up.

When booted to Recovery mode see if Du see the external disk?

That will help rule out a software problem

It doesn't show up in DU on recovery mode, no.

lllaass,

You were the only helpful post I've found through days of searching. I'm having the same issue with my brand new seagate. I can see it in the System Report but can't see it in disk utility or anywhere else. I've tried everything else, making sure External Hardrives is checked in preferences, and everything else the other responses have suggested. So if I can see it in the system report, how can I make it appear in disk utility or anywhere else? Please help!

Hey everyone!

I had the same problem that it won't connect. What was working for me was to connect the power from a usb outlet then to the computer and now i can see it. I guess it didn't have power to connec propertly.

Hey there! Thanks for the info! I'm currently having the same problem did you first download the Paragon trial version to check that it worked before purchasing the software?

Thank you

Stand seagate vertically and with the back of the device to you lean it at a slight angle against a box or something solid.

As crazy as it sounds heeheehaha is correct. I had all the same issues as the previous individuals after I dropped my external while it was plugged in and spinning. Couldn't get it to show up anywhere except System Report. Stood it up vertically with the cord in the air and now it showing up and working again. Who woulda thought.

I have the same problem with my 2TB Seagate external HDD.

I was copying file to it when my iMac suddenly restarted.

Then the Seagate won't show in Finder nor in disk utility. But it is showing in the System Report.

I borrowed another USB 3.0 but still won't show in Finder.

Then I opened Disk Utility and it is taking time to load.

I can see the hardisk indicator that it is being read.

Not more than 15 mins, the Seagate showed up in the list.

Then I tried in Finder and it appeared.

Maybe by the time the computer restarted, it was trying to recover the disk internally.

But it cannot be finished simpnce I keep on plugging ang unplugging it to different ports.

It is now working. Hope this helps.

Patience, my friends.

Unbelievably, this "stood it up vertically with the cord in the air and now it showing up and working again" worked for my Seagate Freeagent Go Pro drive. 😮

Thank you for suggesting!

Hey You're instructions totally worked. It's all in how you "partition" your external hard drive. Thanks!!

My drive was working fine and then all of a sudden stopped.

I can get it to show up in disk utility but the information about the drive is wrong (it says 2.2TB uninitialized, when it is actually 1TB initialized) This was my main Time Machine drive.

I am running a MBP 15" mid-2012 no retina display with 10.11.5. The drive does not show up in the finder, but in Disk Utility it has three options not grayed out. First Aid, Erase, and Info are options. First Aid and Erase both fail when you try to run them. Info brings up mostly correct info except the capacity and used space.

Here is a pic showing the finder, disk utility and the info window. I also tried tilting it on its side and standing it vertical with no luck.

2.2TB is an endpoint of a particular size and class of drives and controllers.

It is likely that the interface card in the external enclosure has died.

If you can extract the drive and move it to a different enclosure, you may find the data are mostly fine.

I had the same problem! The solution is :

Open up Disk Utility--> Select your harddrive--> Verify Disk--> Repair Disk

This is what fixed my issue.

Basically, My external hard drive was not appearing on Finder. It was not new. And the drive connected perfectly, the light showed up and you were able to feel the vibrations of the disk running. And doing this above trick worked perfectly. (:

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Hi lllaass....

Please help me!! my hard drive is not showing on my mac and I dont seem to understand any of the solutions written here 😟

I ejected to early and it now its simply not showing anywhere. The light goes on my seagate 1 TB but thats all, and t doenst show in any other mac or pc. hope you can help!! many many thanks