My external drive is no longer displaying on my desktop

My external drive is no longer displaying on my desktop - Any suggestions on how to solve?
Thanks ;-)

Finder -> Preferences -> General -> Show these items on desktop -> External disks

Similar Messages

USB External drive not showing in Finder, or on Desktop

I have two USB external drives from the same manufacturer. One is for regular storage, the second is for Time Machine and movies.
The first one shows everywhere, on the desktop, in finder and in Disk Utility.
The second drive shows in Disk Utility only. However, it is functioning fine with Time Machine. So it is mounted. I have tried several repairs, and it reports no fault found. So it is certainly functioning correctly, but a setting or error in the operating system is not allowing it to be viewed in finder, or on the desktop.
Any suggestions.

Correction: Title should be Firewire External drive not showing in Finder, or on Desktop.

My G-Technology External Drive is no longer recognised by my MacBook Pro. How do i repair this?

Following months of straightforward backing-up (using Time Machine) my 1TB G-Technology External Drive no longer appears on my screen when powered up and connected to my machine. I have read that this can happen after updates are downloaded onto the MacBook Pro (or indeed any other Mac product) but with update downloads being inevitable this cannot be avoided. Apple tentatively admit this is a problem but offer no solution that I can find! Even more annoyingly the drive itself is designed for use with Mac products and was the simplest plug'n play device I have ever used. Ideas please?
AB@isis

Contact the manufacturer for their trouble shooting support. In any case when updating the OS unmount and unplug external hardrives.

OS X Mavericks (10.9)- Ejecting external drives taking too long

So ever since I upgraded from 10.8.5 to the 10.9 GM any external hard disk or flash drive take too long to eject (~10 s). I'm sure it's not the drives because I've tested the same one on different Mac mini on 10.9 but it ejects within a second or two. I've tried USB 2.0, 3.0 and Thunderbolt drives. Is anyone having this issue and does anyone know how to fix it? I would rather avoid having to do a clean install. I'm using a mid 2012 MBA.

In my case the results of EtreCheck
Hardware Information:
          MacBook Air (11-inch, Mid 2012)
          MacBook Air - model: MacBookAir5,1
          1 2 GHz Intel Core i7 CPU: 2 cores
          8 GB RAM
Video Information:
          Intel HD Graphics 4000 - VRAM: 1024 MB
Audio Plug-ins:
          BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
          AirPlay: Version: 1.9 - SDK 10.9
          AppleAVBAudio: Version: 2.0.0 - SDK 10.9
          iSightAudio: Version: 7.7.3 - SDK 10.9
Startup Items:
          Jaksta: Path: /Library/StartupItems/Jaksta
          Jaksta Music Miner: Path: /Library/StartupItems/Jaksta Music Miner
          ProTec6b: Path: /Library/StartupItems/ProTec6b
System Software:
          OS X 10.9.1 (13B42) - Uptime: 0 days 0:2:18
Disk Information:
          OWC Aura Pro 2012 SSD disk0 : (480,1 GB)
                    EFI (disk0s1) <not mounted>: 209,7 MB
                    Macintosh HD (disk0s2) /: 479,24 GB (244,85 GB free)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
USB Information:
          Apple Inc. FaceTime HD Camera (Built-in)
          Apple Inc. BRCM20702 Hub
                    Apple Inc. Bluetooth USB Host Controller
          Apple Inc. Apple Internal Keyboard / Trackpad
FireWire Information:
Thunderbolt Information:
          Apple Inc. thunderbolt_bus
Kernel Extensions:
          com.seagate.driver.PowSecDriverCore          (5.2.2 - SDK 10.4)
          com.rogueamoeba.InstantOn          (6.0.3 - SDK 10.6)
          com.globaldelight.driver.BoomDevice          (1.1 - SDK 10.9)
          com.protech.NoSleep          (1.3.3 - SDK 10.8)
          com.iospirit.driver.rbiokithelper          (1.21 - SDK 10.6)
          com.radiosilenceapp.nke.filter          (1)
          com.eltima.ElmediaPlayer.kext          (1.58 - SDK 10.4)
Problem System Launch Daemons:
Problem System Launch Agents:
          [loaded] com.paragon.NTFS.notify.plist
Launch Daemons:
          [loaded] com.adobe.fpsaud.plist
          [loaded] com.bjango.istatmenusdaemon.plist
          [loaded] com.bresink.system.securityagent3a.plist
          [loaded] com.corecode.UninstallPKGDeleteHelper.plist
          [loaded] com.creativebe.MainMenuHelper.plist
          [not loaded] com.econtechnologies.ChronoAgentRemote.plist
          [loaded] com.eltima.ElmediaPlayer.daemon.plist
          [loaded] com.genieoinnovation.macextension.client.plist
          [loaded] com.machangout.glims.loader.plist
          [not loaded] com.maintain.AutoLoginUserScreenLocked.plist
          [not loaded] com.maintain.HideSpotlightMenuBarIcon.plist
          [loaded] com.microsoft.office.licensing.helper.plist
          [invalid] com.oracle.java.Helper-Tool.plist
          [loaded] com.radiosilenceapp.nke.plist
          [loaded] com.raynersw.nshctldo.plist
          [loaded] com.soma-zone.LaunchControl.Helper.plist
          [loaded] com.syniumsoftware.CleanAppDaemon.plist
          [loaded] com.zeroonetwenty.BlueHarvestHelper.plist
          [loaded] org.macosforge.xquartz.privileged_startx.plist
Launch Agents:
          [not loaded] com.adobe.AAM.Updater-1.0.plist
          [loaded] com.bjango.istatmenusagent.plist
          [loaded] com.genieoinnovation.macextension.plist
          [loaded] com.machangout.glims.agent.plist
          [not loaded] com.maintain.LogOut.plist
          [not loaded] com.maintain.PurgeInactiveMemory.plist
          [not loaded] com.maintain.Restart.plist
          [not loaded] com.maintain.ShutDown.plist
          [not loaded] com.maintain.Sleep.plist
          [loaded] com.maintain.SystemEvents.plist
          [invalid] com.oracle.java.Java-Updater.plist
          [loaded] com.paragon.updater.plist
          [loaded] com.protech.NoSleep.plist
          [loaded] com.radiosilenceapp.agent.plist
          [loaded] org.macosforge.xquartz.startx.plist
User Launch Agents:
          [loaded] com.adobe.ARM.[...].plist
          [loaded] com.adobe.ARM.[...].plist
          [loaded] com.google.keystone.agent.plist
          [loaded] com.Livestation.plist
          [loaded] com.macupdate.desktop5.scanner.plist
          [loaded] com.maintain.ShowUserLibraryDirectory.plist
          [loaded] com.vemedio.Snowtape.RadioAgent.plist
          [not loaded] info.lokiware.attachmenttamer.cleanup.plist
          [failed] info.lokiware.attachmenttamer.setupagent.plist
          [loaded] us.theWoodwards.CAPSWarn.plist
User Login Items:
          Boom
          CAMonitorBackgrounder
          NoSleep
          iTunesHelper
          UnPlugged
          Mountain
          Essentials
          TabLauncher
          PopClip
          Bartender
          Moom
          KeyCue
          iClipboard
          Did I Click
          Caffeine
          deepClock
          SMARTReporter
          EyeTV Helper
          Meridian
          CommandQ
          SharpshooterAgent
          DockView
          UnblunderAgent
          BlueHarvest
          iTrash
          KeyclickServer
          Application Wizard
          MinimizeAll
          XtraFinder
          Zoom It
          My Living Desktop Viewer
          CDSBupd
3rd Party Preference Panes:
          Application Wizard
          CAPS Warn
          ChronoAgent
          CleanApp Logging Service
          Disksomnia
          EarthDesk
          Flash Player
          Flip4Mac WMV
          FUSE for OS X (OSXFUSE)
          Keyclick
          MenuMeters
          NoSleep
          Paragon NTFS for Mac ® OS X
          Perian
Internet Plug-ins::
          JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Outdated! Update
          Default Browser: Version: 537 - SDK 10.9
          Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8
          AdobePDFViewerNPAPI: Version: 11.0.04 - SDK 10.6
          FlashPlayer-10.6: Version: 12.0.0.39 - SDK 10.6
          Silverlight: Version: 5.1.20913.0 - SDK 10.6
          Flash Player: Version: 12.0.0.39 - SDK 10.6 Outdated! Update
          QuickTime Plugin: Version: 7.7.3
          SharePointBrowserPlugin: Version: 14.3.9 - SDK 10.6
          AdobePDFViewer: Version: 11.0.04 - SDK 10.6
          EPPEX Plugin: Version: 4.1.0.0
          DirectorShockwave: Version: 12.0.7r148 - SDK 10.6
User Internet Plug-ins::
          iGetter Plugin: Version: 2.9.2
          iGetterScriptablePlugin: Version: 2.9.2
          RealPlayer Plugin: Version: Unknown
Bad Fonts:
          None
Old applications:
          Aggregator:          Version: 1.1.1 - SDK 10.4
                    /Applications/Additions/File Manage/Organize/Aggregator.app
          AnyToDMG:          Version: 2 - SDK 10.0
                    /Applications/Additions/DMG/AnyToDMG.app
          Audacity:          Version: 2.0.5.0 - SDK 10.4
                    /Applications/Play Audio Convert/Edit/Audacity/Audacity.app
          Audiobook Builder:          Version: 1.5.3 - SDK 10.4
                    /Applications/Play Audio Convert/Audio Books/Audiobook Builder.app
          Blue Crab:          Version: 5.0.06 - SDK 10.4
                    /Applications/Internet/Download Site/Blue Crab.app
          BookPrinter:          Version: 2011.5 - SDK 10.0
                    /Applications/Additions/Print/BookPrinter.app
          CrystalTV:          Version: 2.0 - SDK 10.5
                    /Applications/Play Video/Internet Media/CrystalTV.app
          CursorCoordinates:          Version: 1.0.1 - SDK 10.4
                    /Applications/Additions/Mouse Keyboard/CursorCoordinates.app
          DMG Architect:          Version: 1.2 - SDK 10.0
                    /Applications/Additions/DMG/DMG Architect.app
          DVD2oneX2:          Version: 2.4.2 - SDK 10.4
                    /Applications/Additions/DVD/DVD2oneX2.app
          DVDProbe:          Version: 1.2 - SDK 10.4
                    /Users/pnn314/Library/Application Support/MacTheRipper/DVDProbe.app
          DataGraph:          Version: 3.1.1 - SDK 10.5
                    /Applications/Office/DataGraph.app
          Disc Cover 3:          Version: 3.0.10 - SDK 10.5
                    /Applications/Toast 11 Titanium/Disc Cover 3.app
          Disc Cover 3 RE:          Version: 3.0.10 - SDK 10.5
                    /Applications/Toast 11 Titanium/Disc Cover 3 RE.app
          Droffett:          Version: 1.0.9 - SDK 10.4
                    /Applications/Additions/File Manage/Organize/Droffett.app
          EarthNet:          Version: 1.0 - SDK 10.0
                    /Applications/Internet/Net/EarthNet.app
          Easy-PhotoPrint EX:          Version: Version 4.5.0 - SDK 10.4
                    /Applications/Canon Utilities/Easy-PhotoPrint EX/Easy-PhotoPrint EX.app
          Elmedia Player:          Version: 4.3.4 - SDK 10.5
                    /Applications/Play Video/Flash/Elmedia Player.app
          FLV Spider Pro:          Version: 3.1.30 - SDK 10.5
                    /Applications/Internet/Download Media/FLV Spider Pro.app
          Fast Image Resizer:          Version: 1.0 - SDK 10.0
                    /Applications/Additions/Image/Resize/Fast Image Resizer.app
          Goldfish Aquarium 2:          Version: 2.0.3 - SDK 10.4
                    /Applications/Additions/Screen Savers/Goldfish Aquarium 2.app
          Graphic Inspector:          Version: 1.7.27 - SDK 10.5
                    /Applications/Additions/Image/Graphic Inspector.app
          IPSentinelStatus:          Version: 1.2.2 - SDK 10.4
                    /Applications/Internet/IP/IPSentinelStatus.app
          ImageConvert:          Version: 1.1.3 - SDK 10.4
                    /Applications/Additions/Image/Convert/ImageConvert.app
          Intaglio:          Version: 3.4.2 - SDK 10.5
                    /Applications/Additions/Image Draw/Intaglio.app
          Keynote:          Version: 5.3 - SDK 10.5
                    /Applications/iWork '09/Keynote.app
          Locations 3:          Version: 3.0 - SDK 10.0
                    /Applications/Internet/Net/Locations 3.app
          MTR 4:          Version: 4.3.0.0 - SDK 10.4
                    /Applications/Additions/DVD/MTR/MTR 4.0.app
          Mail Clips:          Version: 1.0.1 - SDK 10.4
                    /Applications/Additions/Email/Utilities/Mail Clips.app
          Marine Aquarium 3:          Version: 3.2.1 - SDK 10.4
                    /Applications/Additions/Screen Savers/Marine Aquarium 3.2.app
          Microsoft Alerts Daemon:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/Microsoft Alerts Daemon.app
          Microsoft AutoUpdate:          Version: 2.3.6 - SDK 10.4
                    /Library/Application Support/Microsoft/MAU2.0/Microsoft AutoUpdate.app
          Microsoft Chart Converter:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/Microsoft Chart Converter.app
          Microsoft Database Daemon:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/Microsoft Database Daemon.app
          Microsoft Database Utility:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/Microsoft Database Utility.app
          Microsoft Document Connection:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Microsoft Document Connection.app
          Microsoft Excel:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Microsoft Excel.app
          Microsoft Graph:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/Microsoft Graph.app
          Microsoft Outlook:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Microsoft Outlook.app
          Microsoft PowerPoint:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Microsoft PowerPoint.app
          Microsoft Ship Asserts:          Version: 1.1.4 - SDK 10.4
                    /Library/Application Support/Microsoft/MERP2.0/Microsoft Ship Asserts.app
          Microsoft Word:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Microsoft Word.app
          Moon Atlas:          Version: 1.0.1 - SDK 10.0
                    /Applications/Приложения/Moon Atlas.app
          MovieDek:          Version: 1.0.11 - SDK 10.4
                    /Applications/Play Video/Snaps/MovieDek.app
          Multidef:          Version: 1.0.1 - SDK 10.5
                    /Applications/Office/Translate/Multidef.app
          Numbers:          Version: 2.3 - SDK 10.5
                    /Applications/iWork '09/Numbers.app
          Open XML for Excel:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/Open XML for Excel.app
          PDF2Office Desktop Server:          Version: 6.0 - SDK 10.5
                    /Library/Application Support/Recosoft Corporation/PDF2Office Professional v6.0/PDF2Office Desktop Server.app
          PDF2Office for iWork Desktop Server:          Version: PDF2Office for iWork Desktop Server - SDK 10.5
                    /Library/Application Support/Recosoft Corporation/PDF2Office for iWork v2.0/PDF2Office for iWork Desktop Server.app
          PDF2Office for iWork v2:          Version: PDF2Office for iWork v2.0 - SDK 10.5
                    /Applications/PDF2Office for iWork v2.0/PDF2Office for iWork v2.0.app
          PDFSuite:          Version: 1.5.1 - SDK 10.0
                    /Applications/Office PDF/Manipulate/PDFSuite.app
          Pages:          Version: 4.3 - SDK 10.5
                    /Applications/iWork '09/Pages.app
          QuitsApps:          Version: 1.1.1 - SDK 10.4
                    /Applications/Control/Command/QuitsApps.app
          ResizeIt:          Version: 3.5.0 - SDK 10.5
                    /Applications/Additions/Image/Resize/ResizeIt.app
          SLLauncher:          Version: 1.0 - SDK 10.5
                    /Library/Application Support/Microsoft/Silverlight/OutOfBrowser/SLLauncher.app
          Short Links:          Version: 2.0 - SDK 10.0
                    /Applications/Internet/Short Link/Short Links.app
          Solution Browser:          Version: 1.1.5.27 - SDK 10.5
                    /Applications/ConceptDraw Office 2/Solution Browser.app
          Solver:          Version: 1.0 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/Надстройки/Solver.app
          Spin Doctor:          Version: 1.0 - SDK 10.5
                    /Applications/Toast 11 Titanium/Spin Doctor.app
          SuperDuper!:          Version: 2.7.1 - SDK 10.4
                    /Applications/Additions/HD Utilities/SuperDuper!.app
          SyncServicesAgent:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/SyncServicesAgent.app
          TilePhotos:          Version: 1.0.3 - SDK 10.4
                    /Applications/Additions/Photo/TilePhotos.app
          URL Manager Pro:          Version: 4.2 - SDK 10.5
                    /Applications/Internet/Bookmarks/URL Manager Pro.app
          Viewer:          Version: 4.1 - SDK 10.0
                    /Applications/View/Viewer.app
          WashingMachineHelper:          Version: 2.5 - SDK 10.5
                    /Library/Application Support/Intego/Washing Machine/WashingMachineHelper.app
          Web2PDF:          Version: 1.5 - SDK 10.0
                    /Applications/Internet/Screen Capture/Web2PDF.app
          WebArchive Extractor:          Version: 0.8 - SDK 10.5
                    /Applications/Additions/Read Convert/WebArchive/WebArchive Extractor.app
          XLD:          Version: 20131102 - SDK 10.4
                    /Applications/Play Audio Convert/XLD.app
          bartunes:          Version: 1.0 - SDK 10.0
                    /Applications/Additions/iTunes/Control/bartunes.app
          iPhoto To Disk:          Version: 4.0 - SDK 10.5
                    /Applications/Additions/iPhoto/iPhoto To Disk.app
          iSkysoft Helper Compact:          Version: 2.2.6.4 - SDK 10.5
                    /Users/pnn314/Library/Application Support/Helper/iSkysoft Helper Compact.app
          Коллекция клипов (Майкрософт):          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/Microsoft Clip Gallery.app
          Мой день:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/My Day.app
          Напоминания Microsoft Office:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/Microsoft Office Reminders.app
          Отчеты об ошибках (Майкрософт):          Version: 2.2.9 - SDK 10.4
                    /Library/Application Support/Microsoft/MERP2.0/Microsoft Error Reporting.app
          Центр отправки Майкрософт:          Version: 14.3.9 - SDK 10.5
                    /Applications/Microsoft Office 2011/Office/Microsoft Upload Center.app
Time Machine:
          Mobile backups: OFF
          Auto backup: YES
          Volumes being backed up:
                    Macintosh HD: Disk size: 446.33 GB Disk used: 218.30 GB
          Destinations:
                    Time Capcule Disk [Network] (Last used)
                    Total size: 2
                    Total number of backups: 63
                    Oldest backup: 2013-04-21 05:33:32 +0000
                    Last backup: 2013-12-20 16:57:03 +0000
                    Size of backup disk: Excellent
                              Backup size 2 > (Disk size 446.33 GB X 3)
          Time Machine details may not be accurate.
          All volumes being backed up may not be listed.
Top Processes by CPU:
               5%          WindowServer
               3%          EtreCheck
               3%          hidd
               2%          deepClock
               1%          coreaudiod
Top Processes by Memory:
          713 MB          com.apple.IconServicesAgent
          434 MB          Safari
          115 MB          com.apple.WebKit.WebContent
          74 MB          Dock
          66 MB          mds_stores
Virtual Memory Statistics:
          3.61 GB          Free RAM
          2.90 GB          Active RAM
          708 MB          Inactive RAM
          822 MB          Wired RAM
          413 MB          Page-ins
          0 B          Page-outs

External Drive is no longer recognized by Macbook

I have this external drive....
http://www.amazon.com/Western-Digital-Passport-Essential-WDME2500TN/dp/B0012GK3M Q/ref=sr11?s=electronics&ie=UTF8&qid=1280159206&sr=1-1
It is about 60% full of music/pictures/documents that are NOT on my Macbook, therefore I use it regularly.
Every once in a while, I accidentally remove it without properly ejecting first. But I guess I did it one too many times because now the computer will not recognize it at all.
To insure that the drive wasn't corrupt, I plugged it into a PC. It worked fine. The files are all there and were completely accessible. But as soon as I plugged it back into the Mac, it won't show up.
When I try a Disk Utilities repair, I get the following message:::::
FIRST AID FAILED
Disk Utility stopped repairing “My Passport” because the following error was encountered:
The underlying task reported failure on exit
Verify and Repair disk “My Passport”
** /dev/disk1s1
** Phase 1 - Read FAT
** Phase 2 - Check Cluster Chains
** Phase 3 - Checking Directories
Unable to read directory (Input/output error)
Error: The underlying task reported failure on exit
1 non HFS volume checked
1 volume could not be repaired because of an error
I have NO $$$, so telling me to purchase a $30-100 program will not help me AT ALL. I'm looking for solutions that will not effect my wallet, even if they take all day to complete.
What can I do????????

Ok. Just to set one part straight- I doubt the problem came from unplugging your drive without ejecting. This usually isn't a problem unless files are writing or in use when you do it, but ejecting is a safe way to avoid issues.
Try force-mounting the drive in terminal by using the following commands
*mkdir /Volumes/yourdrivename*
this command should give you the location of the drive on your computer. (It should be something like disk2 or disk1s3) Then type the location into:
*mount /dev/yourdrivelocation*
Whether or not this works, follow up this step by ejecting the drive and unplugging and plugging it back in. This worked for me when I was having this issue.
Also- are you able to backup and reformat the drive? This would be a good thing to try if other attempts have failed.

Greetings. I need to know what to do if a formerly recognized external drive is no longer recognized by my iMac.

Greetings. I could use some advice here.
I bought a WD external hard drive to back-up some files on my old iMac, but I reformatted it & set it up on my new iMac.
After I backed up the files I wanted, I hooked the external drive to the new iMac, but now the new iMac doesn't recognize that external drive.
What should I do?
I also have a flash drive that neither iMac will recognize. Similar issue or no?
Would appreciate any adice I can get on these situations.
Thanks for you time and attention.

You need to deal with your vendor or AppleCare Customer Relations. We can't tell you what to do nor what is possible.
It's unfortunate you have had these problems, but we really cannot resolve them for you. We do not represent Apple nor can we tell you what to do other than attempt to resolve the issue either with your vendor or through Customer Relations.

External HD is no longer loading to the desktop

I have two external drives connected by firewire that are no longer appearing on the desktop.
It worked fine until I ejected both of them from the desktop. I turned off the power of the iMac then restarted the iMac and turned the external drives. Now they won't appear on the desktop. What is the solution to get them to be recognized again.
I tried Disk Utility but it doesn't see the drives.
JKai

If Disk Utility does not have them in the sidebar, they are not being recognized by the system, for some reason.
Try shutting down (powering off) the iMac. Disconnect one drive so that there is only one connected to the iMac. Power on the iMac and then the drive. Is there any difference if only one drive is connected?
Try doing the same thing with only the other drive connected.
It is possible that one of the drives has become faulty and it is preventing the other one from being recognized as well.
Be sure to try using a difference FireWire cable and if your iMac has more than one FireWire port, try the other port.

External Drive (WD) has disappeared from finder and desktop

Hello,
I use an external drive connected via firewire for time machine. The drive still seems active but I cannot access it at all, not through finder, disk repair or other. I have tried disconnecting, reconnecting all cabline, restarting bith the drive and the iMac, I have doen the SMC and PRAM reset actions. Still not visible.
I do not have the option to connect to another MAC, my MBP does nto have FW and thatis th eonly option on the drive.
Any suggestions greatly appreciated.
Thanks,
Peter

Thanks,
Here is what I see on the profiler under "external HDD buttons and lights". Looks like it is not pulling valid information - based on all "0x" preseedign everything.
External HDD Button & Lights:
Manufacturer:          WD
Model:          0x0
GUID:          0x90A991E0101194
Maximum Speed:          Up to 400 Mb/sec
Connection Speed:          Up to 400 Mb/sec
Sub-units:
External HDD Button & Lights Unit:
Unit Software Version:          0xCE0002
Unit Spec ID:          0x90A9
External HDD Device Unit:
Unit Software Version:          0x10483
Unit Spec ID:          0x609E
Firmware Revision:          0x100
Sub-units:
External HDD Device SBP-LUN:

My G-Drive 4 TB external drive is suddenly not appearing on my desktop!

The external drive is also not showing up in Disk Utility. Any suggestions?

Check the drive’s connections, including the cable used to plug it into the computer. If it’s connected properly, it’s probably dead.
(117178)

Indexing A External Drive I no longer Have

i had a friends mac connected as a ext drive. she took it home. but my spotlight is still indexing the drive which of course not connected anymore. how do i stop this? is there a easy way? or do i have to go into the dreaded "terminal"
thanks for your help

Hi, might try Spotless...
http://www.fixamac.net/software/spot/

External drive suddenly no longer formatted

i've had a 150 GB internal HDD in a firewire enclosure connected to my mac pro for the better part of 2 years, it basically houses my itunes library and thats it.
it worked fine yesterday when i left work and left the computer on.
this morning, (after the computer was shut down and booted back up) i get "the disk you inserted was not readable by this computer" and it gives me the options to initialize, ignore, or eject.
looking in disk utility (both from within osx, and from running the dvd on boot, it recognizes the drive, but no volumes attached to it, so it wont let me verify/repair disk or verify/repair permissions...
under "partition map scheme" it says it is unformatted...
any suggestions?

I'd be more inclined to reset the FW bus; make sure everything is on UPS, and try Disk Warrior. However, I"ve seen threads in OS X Leopard: Using about FW drives not mounting/not ejecting safely and other problems.
... which is why always backup, and backup your backup too.
Maybe time to retire the drive or case for newer unit if its starting to have trouble and been in use over two years.

USB External Drive Trouble

Back in April, I hooked a 500 GB USB external drive to my iMac in order to run time machine. All worked fine until October 17. Yesterday Time Machine popped up with a message telling me it had not backed up in 10 days and I should figure this out. At this point, I noticed that the external drive was no longer mounted on the desktop, although I could see it in Disk Utility. The POSIX error came up. After a long search on the forum and fighting with a PC in the house, I was able to reformat the drive and let Time Machine do its thing.
The initial backup went great and it seemed to back up every hour until 12 am or so it says. Once again, I came down this am and the drive is not mounted and not showing in Disk Utility. I turned it off and on again and now the computer tells me it needs to be initialized.
What in the world is going on? Is it related to USB control and SL? Is it a Time Machine issue? Should I reformat the drive and see if I can simply copy files to the drive and see if it stays mounted that way?
I do not know how to tell an external drive when to unmount or if it should upon the computer going to sleep.
Any help would be greatly appreciated before I spend more money on a new drive.
Debbioe

Thanks, that one's not on my suspect list... yet
Good luck with the replacement, I'm sure it will be fine. When you get it remember to format for Mac OS X.
1. Launch Disk Utility
2. Click the "Erase" tab
3. Select your entire external drive on the sidebar (the uppermost icon).
4. Format: "Mac OS Extended Journaled"
5. Name the Disk (Time Machine, or whatever) only the name of the volume will show in Finder.
-mj

No longer recognizing LaCie external drive.

I have been using a LaCie Quadra external drive to backup my files. Since the last system upgrade the external drive is no longer being recognized. I have followed the troubleshooting suggestions from the LaCie site i.e. checking with different cables. When I connect with the USB nothing is listed in system profile, however when using a firewire cable to connect both 400 and 800 system profiler lists "unknown device". When I run disk utility: repair disk it says the disc is OK. I have a tried all of the troubleshooting on my iBook which has the same system with same results. I have also tried a different LaCie Quadra drive which has not been used with same results, so have concluded there must be something in the system rather than hardware. Any suggestions about where to go from here?

I have also tried a different LaCie Quadra drive which has not been used with same results
I had a LaCie Quadra drive exhibit similar symptoms recently, and it turned out to be a bad power brick, even though the drive seemed to power up OK. When you tried replacing your LaCie drive with the other one, did you also use the other one's power adaptor?

External Drive No Longer Visible

My external drive is no longer showing up either in the finder, on the desktop or if I click the computer name under the devices tab on the sidebar. The only way to access this drive at all is to open up disk utilities, select the drive, right click the drive and choose Open "XXXX". If I choose Reveal "XXXX" in Finder it opens to the Volumes area and that drive is not visible.(see screenshot) The finder preferences have external drives set to show up in the sidebar and on the desktop.
I can access folders and files on the drive if I place a shortcut for that file/folder on the desktop. But even when using this method the drive shows up in the sidebar but is grayed out. (see screen capture below)
This drive is shared via Mountain Lion Server and shows up fine for systems connecting to it via the network.
I recently manually changed the permissions of this volume and propagated them via the server utility (we were having permissions issues with certain folders and files for server users). After that I ran a couple of updates to the computer. I suspect one of these was the culprit, although that could be just a coincidence.
We have a bit for bit copy of this drive (SuperDuper) that is on an internal drive in this computer and it shows up fine.
Any ideas? Any help would be greatly appreciated.
I am going to try trashing the p-list file, but as this is an actively used server I can't take it down for any length of time during working hours.
Facts:
Mac Pro 5,1 Quad Core Xeon
OS 10.82
The Drive is a 13TB Promise V-Track RAID connected via Fibre Channel
Drive shows up as Mounted in Disk Utility
External Drives are set to be visible in Finder & Sidebar Preferences

Update:
Ran ANOTHER server update from the APP store. Then rebooted. Nothing changed.
Found another thread that suggested deleted you com.apple.finder.plist and rebooting so I gave that a try. Now NONE of my drives are showing up in the finder other than the drive the OS lives on.
Same behavior and I can still access the drives via Disk Utility using "Open XXX " command.
For now I have created Aliases to both so I can at least get to them via the desktop.
H-E-L-P
Please

Mountain Lion 10.8 no longer recognizes external drives

I just upgraded to 10.8 and my two external drives are no longer recognized (either in Finder or the desktop). One is a Drobo raid drive and the other is a Seagate 2 TB external drive. Both have been working fine for years under the previous OS version but are not recognized by 10.8. I have rebooted both the iMac and the drives but nothing shows up. Drobo provides a desktop dashboard that does see the Drobo drive and reports no errors. I use both drives for backups which no longer works since the drives are not recognized. Any suggestions?

Yes, both there.. but 'repair disk permissions" and "verify disk" are greyed out on Drobo and all are greyed out on the Seagate.

My external drive is no longer displaying on my desktop

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