External hard drive not showing up on my MacBook Pro

By ml1962
Oct 13, 2011
Post New Reply
  1. SNGX1275

    SNGX1275 TS Forces Special Posts: 12,817   +370

    I don't know that I can help outside of what I have already said in this thread.. perhaps someone else will come along with some additional advice.

    I guess I have one thing to say, if it is a western digital drive, check on their site to see if there is a Mac update for it. Suppose its worth checking the manufacturers site for any updates even if it isn't a WD.
  2. donggroo

    donggroo TS Rookie

    My harddrive wont work too. and in the disk utility it shows it as an internal drive > < I have everything stored in it, how do I recover this?
  3. faculae

    faculae TS Rookie

    This was a super helpful thread thanks so much.
  4. Avavalerie

    Avavalerie TS Rookie

    Firstly thank you very much SNGX1275 for all your help.

    OK! I am having the same issue as most people here.

    It shows up in Disk Utility and now I am attempting to repair it now.

    It says there is:
    Invalid key length??
    Invalid sibling link...??

    And then that the disk cannot be repaired... (check out the screen shot).

    I have used this WD drive with my Macbook previously, why now is it not working and am possibly going to loose a lot of my data because I have to reformat the disk??

    Attached Files:

  5. SNGX1275

    SNGX1275 TS Forces Special Posts: 12,817   +370

  6. Kenlow

    Kenlow TS Rookie

    I have the similar problem and good thing is my hardrive is showing in Disk utility but wen I opt : repair disk it says these (see pic uploaded) wat I get and nutin happens after that - I just need ur help to retrieve my important files n I can then format the HD

    Attached Files:

  7. SNGX1275

    SNGX1275 TS Forces Special Posts: 12,817   +370

    I would try and connect that to a Windows computer to see what happens. Doesn't appear OS X can deal with fixing it (FAT32 isn't really something OS X does - it just supports it).

    Just for fun, I would click Verify disk (as opposed to repair) and see what it returns.

    Also instead of doing ctrl-apple-4 and screenshotting the entire screen, you can do ctrl-apple-3 and then draw a box around the area you want to capture.
  8. Kenlow

    Kenlow TS Rookie

    Thanks for that screen shot shortcut - wen I connect on a PC it shows and disconnects automatically and this hard rive was formatted on mac so pc doesnt recognise it usually - please help if there is a way to solve this here on Mac
  9. SNGX1275

    SNGX1275 TS Forces Special Posts: 12,817   +370

    In your screenshot it indicates it is formatted as FAT. FAT almost always means FAT32 when it is displayed that way with a 'modern' hard drive in OS X. FAT32 is more a DOS/Windows file system, OS X (nor Mac OS prior to OS X) did not use that although it can read and write to it. So what I'm saying is, Windows can read (and is just as good or better with that file system than OS X) and write to that format.

    I don't know of any way to fix it. There may well be some good free utilities for repairing disks on OS X but I don't know any off hand (I guess Tech Tool Pro, although not free). You could attach it back to a PC and see if you can get any diagnostic information from something like SeaTools. Or use some Windows recovery programs. Alternatively you can venture into the world of Linux/UNIX and see if there are any things you could install to do it through the terminal on OS X - but I think your best shot here is to use some Windows software to deal with it.

  10. Thank you very much for your help! Your advice was right on.
    SNGX1275 likes this.
  11. I have the same problem with my mac. The hard drive is brand new and Mac is unable to detect on disk utility.

Similar Topics

Add New Comment

TechSpot Members
Login or sign up for free,
it takes about 30 seconds.
You may also...
Get complete access to the TechSpot community. Join thousands of technology enthusiasts that contribute and share knowledge in our forum. Get a private inbox, upload your own photo gallery and more.