OSX can no longer find USB 3.0 external drive

My macbook air was able to read from my USB 3.0 external drive a couple weeks back when I last plugged it in prior to yesterday. Yesterday, when I plugged the drive back into the computer though, my machine was unable to detect the drive at all.  It was not in finder, the desktop, or disk utility. Nor was it visible with the "diskutil list" command.  I plugged the drive into a separate windows PC, which was able to access it fine.  I scoured online for some tips, and ended up trying to use the usb prober tool, which didn't work.  The drive has its own power adapter, and is not bus-powered.  It turns on whenever I plug it in, but my machine is not able to detect it. I do not have another USB 3.0 device to test the macbook air with, but I have used other USB 2.0 external drives, which are detected by my macbook air fine.  I updated to 10.8.3 before I plugged the USB 3.0 drive in, but I am not sure if that would be the cause of this issue.  Are there any other tips that I could try that may remedy this issue? Any advise would be much appreciated with this predicament.

Try restarting your Macbook then plug the USB External Drive again and see if that works.
if all else fails - try doing a SMC RESET and see if that sorts it out for you.
Good luck

Similar Messages

  • My iMac can no longer find one of the external hard drive

    My iMac can no longer find one of the external hard drive. It was finding it once in awhile and during one of those times I ran Disk Utility and all was OK. Any ideas?

    Well duh.  I restarted the router and then it was able to find the printer.  There you go.  Thanks.

  • ITunes can no longer find my files from external Library

    I have a PC using Windows 7, I have had my iTunes library stored on an external drive for ages and it has been working brilliantly. I have recently done some updates both for iTunes and my 3rd gen iPad, tried to sync some different movies to my iPad and iTunes can't find my files any more. The location of my library had reverted to the local drive, I tried to change it back but to no avail. The files are still on the external drive, when I try to open them with iTunes manually, iTunes tries to open but then says a problem has occured and it must terminate, it offers to find a solution online but (after the first time when it said an update was available to fix the problem and i downloaded it) it then just closes. The version of iTunes is 10.7.0.21 on the iPad, I am running iOS 6.0.1

    Locate and remove the iPod Photo Cache folder(s). A new one will be recreated the next time you sync Photos with your iPhone, iPad, or iPod. Deleting this folder will not remove the original images from your library, but may solve your sync problem.
    This explains how:  http://support.apple.com/kb/TS1314

  • Why can iTunes NOT FIND songs on an EXTERNAL DRIVE

    I've read many posts regarding the use of external drives for iTunes data storage. Here's my situation:
    I've just restored my computer to it's factory settings, then installed iTunes 9.2.1.5 My iTunes consists of songs only and they reside on an external drive following this path: E:\iTunes Music\(artist)\(album)\(song[s])
    iTunes Music, artist name, and album name are all folders. The songs appear in numeric order (01, 02, etc.), and are individual MPEG files.
    I have tried changing the iTunes Media Folder location to: E:\iTunes Music (by following: Edit-Preferences-Advanced) Indeed, I have attempted all possible folder paths...right down to individual songs...nothing works. iTunes simply does not see the folder(s)/songs. What's up?
    The frustrating thing is that this very same external drive worked just fine before this whole affair! ??? What am I missing? Please provide a detailed answer. Many of us out here would like to know the secret.

    You'd have had more luck if you'd moved your library files out to your external drive as well as the media. That way, when you'd reinstalled all you would have needed to do was use SHIFT-start iTunes and point it at the library on the external.
    Next time you reinstall Windows backup the entire *Documents and Settings* or Users folders from the C:\ drive so that after the rebuild you can restore anything you discover you still want from your old profile.
    Better yet do these backups before something goes wrong, say once a month. The following tool is great for general backups of any specifc set of folders, not just iTunes.
    <hr>
    *Fast backup for iTunes library (Windows Only)*
    Grab SyncToy 2.1, a free tool from MS. This can be used to copy your entire iTunes library (& other important data folders) onto another hard drive or network share. You can then use SyncToy periodically to synchronise or echo your library to the backup. A preview will show which files need to be updated giving you a chance to spot unexpected changes and during the run only the new or updated files will be copied saving lots of time. And if your media is all organised below the main iTunes folder then you should also be able to open the backup library on any system running the same version of iTunes.
    <hr>
    tt2

  • My acer Aspire V7-481P touchscreen stopped working. I can no longer find the pen and touch settings on my computer, please help.

    My acer Aspire V7-481P touchscreen stopped working. I can no longer find the pen and touch settings on my computer, please help, I have tried to download all the drivers on the acer website and it is still not working. The touchscreen previously worked before
    but unexpectedly stopped.

    touchscreen don't need driver
    go to device manager, find Human Interface Device, find HID-compliant touchscreen (maybe under USB input device), try to enable it, click yes and restart PC
    If not solved, try to perfrom system restore (back to condition when this PC working fine)
    http://acer.custhelp.com/app/answers/detail/a_id/11564/related/1
    for more details TS, i suggest contact Acer

  • Safari 6.0.4 "broke" Share button - also Mail can no longer find the application (installed via Map App store)

    Since installing the 6.0.4 Safari update via the Mac App store, I have a host of problems:
    1.  Mail can no longer find "an associated app" when I click on a url in a mail message
    2.  The Share button (extension) in the Safari toolbar no longer works
    3.  Any attempt to open a new url results in a new safari window being opened although in my preferences I have "open new windows in tabs" selected
    4.  If I click on a tab that was previously open I am continually asked to refresh the window
    5. I have had about a half dozen "Safari not responding" events since the upgrade, forcing me to Force Quit - generally when I'm trying to use one of the extensions or returning to a prebiously opened tab 
    6. Safari is intermittently unresponsive to  mouse clicks -functionality can only be restored by refreshing the page
    7.  Safari can no longer find my passwords for some extensions (e.g. Buffer)
    8. Safari is EXTREMELY slow loading pages - stalls out a few moments after entering url (or switching back to that tab) - sometimes for as long as 2 or 3 minutes
    All the Safari extensions I have were eeither pre-installed or from Apple's Safari extensions page.
    The install also corrupted my iCloud (AppleID) password, but thiswas easily fixed in Keychain.
    Anyone have a fix or know of any software conflicts that could be responsible?
    OSX 10.8.3
    Safari 6.0.4

    From the Safari menu bar, select
    Safari ▹ Preferences ▹ Extensions
    Turn all extensions OFF and test. If the problem is resolved, turn extensions back ON and then uninstall them one or a few at a time until you find the culprit.
    If you wish, you may be able to salvage the malfunctioning extension by reinstalling it. That will revert its settings to the defaults.

  • Help! (please :) I have a 1GB iPod that's loaded with music for which my computer can no longer find the original files-due to external mass storage crash during recent move. Is there a way to import iPod music back into my iTunes library on computer???

    Help! (please I have a 1GB iPod that's loaded with music for which my computer can no longer find the original files-due to external mass storage crash during recent move. Is there a way to import iPod music back into my iTunes library on computer???

    Or If there is any purchased music then you can try to transfer purchases
    http://support.apple.com/kb/ht1848
    If you're in the US you can reload purchased music
    http://support.apple.com/kb/ht2519

  • I use my time capsule for wifi station and back up. However suddely time machien can no longer find the time captule drive , used for back up...

    Time machiene can no longer find the back up files on my time captule..
    I have have manged to see the files via finder.
    dleted the files, and also gave time captule a new name, and pasword.
    All seemd fine but somehow the new back up could not be finished.
    Repeated all the steps, but now had the  computer hooked up to the time captule with a network kabel ( make it go quicker..)
    Still no succes...
    Seems somhowe acces to the time captule is difficult for the time machien software...

    You may find useful advice in this post.

  • My Apple TV can no longer find my network - help?

    I've been using my apple tv for a LONG tme successfully until tonight.
    It can no longer find my network (airport network)!
    Resetting/restarting the apple tv has not helped. I can't update anything because it can't connect to the internet (even though my computer and phones and even roku are connecting just fine).
    I've tried restarting everything (airport, internet box, apple tv) as well as plugging and unplugging things...
    I had noticed a few times it was having trouble connecting but restarting seemed to fix it. My apple tv is from last year so it's not old.
    Any suggestions?

  • I just upgraded to Mavarick.  I can no longer find my mailboxes in my e-mail.  I read to go to 'finder'/ go go to folder the type in ~/Library which I did and I eventually found all my mailboxes.  But I want them to be available from my e-mail.  How ?

    I just upgraded to Mavarick.  I can no longer find my mailboxes in my e-mail.  I went to 'finder', under 'go'> go to folder / mail and eventually I found all my missing mailboxes.  But I want them to show up as they used to, in my e-mail.  How do I get them back?

    .........and just wasted more time clicking on the 'chat online' link which of course does nothing.
    I'll be spending time searching for an alternative ISP instead. Absolutely sick of this.

  • Since the last update my iphone 5 can no longer find my devices.

    Since I last updated my iphone 5 iOS to 6.1.3, airplay on my panasonic HC-57 dock has stopped working. So has my wireless HP photosmart C4380 printer ePrinter app. The iphone can no longer find either of them. I have tried rebooting. I have tried re-loading the drivers and apps. I have tried everything. Before they worked perfectly. I could play music and print whatever I wanted. I have just tried updating to iOS 6.1.4 and this has made no difference either.#
    What is more, I have purchased the iphone 5 30-pin to lightning adaptor from the Apple store, and it wont let me play music on my panasonic dock through I direct connection either. It only allows charging.
    Please find a solution as this  change in software by Apple has rendered my new panasonic dock and printer useless.

    For Starters this a user forum no Apple response to complaints on here
    I suggest you start by restoring with a back up and if that fails restore as new
    especially if you updated over the air rather than iTunes
    A restore will install a fresh iOS 6.1.3 rather than a patch update

  • I have an iphone 4s and have installed the new ios download and can no longer find games and other apps that i have downloaded. Where would they be or have they been wiped?

    I have an iphone 4s and have installed the new ios download and can no longer find games and other apps that i have downloaded. Where would they be or have they been wiped?

    Hi,
    don´t be worry, this would not be a problem.
    You have to take the same Aplle ID on both devices, then you can sync them via iTunes by using all universal apps on each device, create playlists, albums and all the things you need and sync it, no problem...
    cu
    dienoppe

  • I subscribed for itunes imatch - it works perfectly on my i-pad and iPhone - however on my macbook - my iTunes can no longer find my songs - i don't know how to make it look to the cloud to play my music

    i subscribed for itunes imatch - it works perfectly on my i-pad and iPhone - however on my macbook - my iTunes can no longer find my songs - i don't know how to make it look to the cloud to play my music - i think it keeps trying to find on the external harddrive where i used to keep my music

    Of course iTunes is looking for the music on the external HDD. Enabling iTunes Match does not magically change the location of the iTunes library to the cloud.
    To play the music either plug the external HDD back into your computer or create a new, empty library to use for streaming the iTM content. The latter can be accomplished by holding down the Option key when launching iTunes, choosing "create library" then enabling iTunes Match on the new library. DO NOT have iTunes scan your HDD for music.

  • Can no longer find or use Auto Trace in Illustrator CS11

    My system was recently "upgraded" to Windows 7. Now I can no longer find the Auto Trace option in Illustrator CS 11. I see it in the preferences but cannot access it through a menu. I see "expand" but it's gray and not available. Any suggestions?

    screen-naim,
    You should have Auto Trace in CS, also known as 11. It was replaced by Live Trace in CS2.
    I believe it is bundled with the Blend Tool in the Toolbox (ClickHold to see it fly out).

  • I just updated my iPhone 4s iOS to iOS 8 and but can no longer find personal hotspot, How and where can I find it on my iPhone 4s

    I just updated my iPhone 4s iOS to iOS 8 and but can no longer find personal hotspot, How and where can I find it on my iPhone 4s.
    Usually I share my internet with other device with ios7 but now that I have ios8 on my iPhone 4s I can no longer find the personal hotspot. How can I share internet with other device using ios8 on my iPhone 4s?
    THanks

    Settings>Cellular>Personal Hotspot. The carrier has to support this for you. This is where you should find the setting to turn it on or off.

Maybe you are looking for