Seagate External HDD won't show up.

- Have you rebooted the computer?

- Is the drive self-powered, that only powered by the USB bus? If so it could be that the USB port does not provided enough power. You can try a powered USB hub. You can also get a USB pigtail that takes power from to USB ports to the single USB port on the drive like this one.
StarTech.com® 1' USB Y Male To Micro-B Male Cable For External Hard Drive, Black

- Does it show in Disk Utility?
- Does it show in System Profiler under USB? You should see the chipset in the enclosure as well as the HD itself
OS X: About System Information and System Profiler - Apple Support
https://support.apple.com/en-us/HT203001

- Does it work/be seen when connected to another computer?

It could be the electronics in the enclosure or the disk inside died

Thank you so much for your answer!! Unfortunatly I've tried it all and it didnt work!

It shows like this...

That info would indicate either of:

- The disk inside failed or there is a connection problem between the disk and enclosure

- The USB port is now not providing enough power.

I have a seagate external hard drive that was working. Then it started to say disk not ejected properly. I had this happen on my other macbook pro about a year ago. Now its doing it on my new one. I tried it on my iMac and it works fine. Its just not recognizing it on my macbook. It doesn't show under disk utility either. The light is on on the HDD but you can't see it on the computer.

Please help! Im losing my mind over here.

i am facing the same problem. although, i am not sure whether the issue is because i updated the OS to Sierra or some other problem but my laptop wont read the H.D. the light of my hard drive is on as if its functioning and the drive is readable on other laptops as well.! please fix this issue.

Tried every single solution explained on this thread and nothing worked. In the end I went to System Preferences -> Paragon NTFS Drivers panel and ticked the box "Turn the Paragon NTFS for Mac OS driver off". My Seagate magically reappeared.

I'm no expert and with the same problem with my 2TB Seagate I tried all listed herein. I took the drive to a repair shop and nothing wrong with it, or cable. The drive appeared in System Report, but not on desktop/menu. Seagate site says that the ExHDD doesn't need drivers. However, as I had just updated to OSXSierra, I searched out firstly an update to the Seagate Dashboard - no difference, then stumbled upon a Paragon driver update. Bingo! Hope this helps someone.

I didn't see my Seagate drive on the system report, nor see it on disk utility.

For me, the solution was to not connect the USB connector all the way into the USB port. Just put it all the way in, and then pull it out about a millimeter or so, until you see it appear on the finder.

Hi everyone,

I hate to say this. But I'm starting to have the same/similar problem since last week (~ Oct 22).

I had been using this drive (WD Elements 10A2, 1T NTFS, USB 3.0 compatible with 2.0) with my Mac Air (early 2014, Yosemite installed with Paragon NTFS 12) for roughly 2 years without any issues, before everything just suddenly happened.

Now I have to either (1) carefully orient my USB cable to connect the drive to my Mac (see photo, which demonstrates one of the few working orientations), or (2) to press very hard to make sure that the junction between the cable and the drive is really tight; otherwise my Elements won't even show up in System Information, though the disk is indeed spinning.

I tested the drive under Windows and Linux on different PCs, and the drive works just fine. I don't have to orient the cable or to tighten the junction at all.

I tried updating to Sierra and Paragon v14.2.359, but didn't work.

I'll see whether my Mac can still recognize other external drives in a "normal" way. But before I do that, I'd like to know if anyone has any idea about this issue? Please kindly help!

Thanks a lot.

Mythracis

I used fulviom's solution: System Preferences -> Paragon NTFS Drivers panel and ticked the box "Turn the Paragon NTFS for Mac OS driver off". It worked for me, thanks for posting it fulviom! My 2TB Seagate suddenly stopped showing up on my MacBook Pro, however, it worked perfectly on my wife's and on our older HP laptop. I could see the drive in the Disk Utility on my machine and it was indicating the drive was full (it wasn't - not even close). I erased the drive, emptied the trash, and still had the same issue. The System Report showed the drive just fine. I had tried just about everything else in the thread short of doing any resets with no luck. Your solution did the trick. An exceedingly frustrating problem solved with the simplest of solutions. Thanks again!

My mac still recognize another drive (Seagate, USB3.0, NTFS) without any problem.

But when I tried to connect my Elements through the Seagate cable, it doesn't work.

BTW, I've tried everything suggested by all posts, especially those from @ lllaass, but none worked..

When I use a USB2.0 cable (used for my cell phone), my Elements can be connected. So it seems to be something specific to USB3.0?

System Preferences -> Paragon NTFS Drivers panel and ticked the box "Turn the Paragon NTFS for Mac OS driver off". (fulviom's solution)

This worked for me after trying every other solution on the thread! Thank you so much!

Hey fulviom,

Thanks buddy....used your solution to solve my problem.

I also used fulviom's solution and it works! Thank you fulviom 🙂