External Hard Drive Not Showing Up

if i send you my terminal log can you tell me...im having the same problem of ext harddrv hidden or not showing up..

robert-collinss-imac-2:~ robert$ ls -laeO@ /Volumes

total 8

drwxrwxrwt@ 3 root admin hidden 102 May 7 07:26 .

com.apple.FinderInfo 32

0: group:everyone deny add_file,add_subdirectory,directory_inherit,only_inherit

drwxrwxr-x 44 root wheel - 1564 May 7 07:43 ..

lrwxr-xr-x 1 root admin - 1 May 7 07:26 Mac OS -> /

robert-collinss-imac-2:~ robert$

@@@Cn you check this out for me too

I followed the various tips and tricks and ran into the same roadblocks found by all of the above. The solution I discovered falls under this makes no sense but it worked: With the Disk Uility open, and displaying the USB external drive with options faded/grayed out and unmountable, I connected another external USB drive to another USB port just to see if this drive displayed...it not only displayed in the Disk Utility and on the desktop and the Finder window list, but also the non-recognized drive also displayed on the desktop and Finder window list though no change in the Disk Utility accessibility...I then did a proper eject from the finder window list (just in case it might disappear) of the now displayed drive (before it did not display). Restarted the computer, connected the drive and now all works. Go figure.

Do this:

FRom the Finder Menu:

click "Go to Folder"

then type the path from what appears under Disk Utilty e.g.

/Volumes/slimdisk

Then magically in Finder, you will be in the root folder of this invisible drive! (this worked for me)

The same happened to me.

For me worked this:

- go to disk utility - there you will see your disk

- click on it - click on repair disk - wait

- the you will be able to see your disk on the left panel of the finder

My Iomega HD won't mount on either of my macs, I ran disk verify and disk repair and get the following message. Any help would be greatly appreciated. I can't reformat(erase) disk. I need to recover the files.

Thanks

For me, after much vain efforts, this 2-lines approach worked:

http://osxdaily.com/2013/05/13/mount-unmount-drives-from-the-command-line-in-mac -os-x/

I found the identifier, then mounted succesfully.

i have the same problem

this what appears

total 8

lrwxr-xr-x 1 root admin - 1 Jan 5 14:57 ' -> /

drwxrwxrwt@ 3 root admin hidden 102 Jan 8 00:47 .

com.apple.FinderInfo 32

0: group:everyone deny add_file,add_subdirectory,directory_inherit,only_inherit

drwxr-xr-x 35 root wheel - 1258 Dec 18 12:05 ..

Apples-MacBook-Pro:~ apple$

this also appear to me

I tried mounting the disk and it says "The disk “dina” could not be mounted.

thaaanx

i did this i restart my mac and open it i founde it mounted

after long serch

This happened to me, did Disk utility, disk was on there, verified it, repaired it, still did not show up. Also, my computer would not even let me eject the *******.

Here's what did it.

In all my rage at my less-than-a-year-old-seagate pushed me to slam on the power button. As I held down that button, with no mercy mind you, I relished in the sound to hear my computer turn off. In this moment of rage, I did not unplug my hard drive or even my iPhone. Upon the restart, I noticed something in my finder, my hard drive! alas! what a glorious day.

Moral of the story kids, manually turn off your mac and your hard drive should be there.

I had the same issue with a grayed-out partition that was recognized, but could not be mounted.

OS 10.9.2, 2013 iMac, Seagate Backup Plus Drive 1TB.

Despite months of proper functioning and it would not mount, not after power-cycling and trying different USB ports. Even tried mounting via diskutil from the command line as mentioned here. Both Verify Disk and Repair Disk in Disk Utility reported no problems.

I finally gave in and decided to Erase, as it was only Time Machine backup data, and all the original data was on my iMac. Erase took about 10 seconds, and then the disk un-grayed in Disk Utility, and showed up in Finder as mounted.

I'm running a Time Machine backup right now (on the empty disk) and all seems to be working fine again.

Follow the below steps in the exact order listed.

1. Unmount the problem external drives using Disk Utility.

2. Turn power switch off, if there is a switch.

3. Disconnect the data wire connection at the external drive box.

4. Disconnect the power cord at the external drive box.

5. Wait at least 5 minutes.

6. Plug the power cord into the external drive box.

7. Plug the data wire connection into the external drive box.

a. If using more than one external drive, let the drives become connected one-at-time.

8. Turn on power switch if present.

9. The problem drive should appear in Finder.

10.If the problem drive does not appear, repeat the above steps with Step 5 having a wait time of one hour.

11.If the problem persist, repeat the above steps with Step 5 having a wait time of at least 24 hours.

12.If successful, please give positive feedback on this site.

I was having the same problem; disk not showing in Finder but visible in Disc Utility. Then I noticed in the Finder window, just below the Favourites list and above Shared is a pale grey word: DEVICES. Clicking on this worked for me. External devices then visible. Good luck!

Thank you so much for this, this seemed to be the only thing that helped and solved the problem that was addressed on this forum.