External hard drive doesn't show after upgrade to Yosemite

I upgraded to Yosemite and now my WD 1TB external HD doesn't show up on my MacBook Pro 2.9 GHz. It shows in the system information under 'About This Mac', but I can't access it. So I can't use Time Machine to do any back-ups, and I can't back up the files on the external drive before reformatting it. Anyone know how to fix this? From other web communities, this seems to be an Apple problem and NOT a hardware issue.

If it shows in Disk Utility, use the Restore tab to copy the files to another location. Note the warning about reformatting the destination.

Similar Messages

External Hard Drive will not mount after upgrading to Yosemite

After upgrading to Yosemite, my external 3TB hard drive will not mount... can't see in Finder, but does appear in Disk Utility. Follow steps to Repair disk, but get a message that D.U. cannot repair disk.

See mount section.
Disk Unmount Using Terminal
Disk Utility – Force Mount Disk

My external hard drive doesn't show up in finder, is it dead?

My external hard drive doesn't show up in finder.Time machine can't find it. Does this mean my external hard drive is dead?
I borrowed a friends and switched mine with hers. My acted the same way in her macbook. I switched the cords on the external drives, no change.
Also, Is there a way to retrieve the information from my sick external hard drive? Thanks for your help.

If the Disk Utility sees it, you might be able to repair it or recover the data on it with a product such as DiskWarrior or Data Rescue.
If the Disk Utility doesn't see it, contact professional support.
(64290)

External Hard Drive doesn't show up

hi.
i'm having an issue with my external hard drive. this morning i went to plug it in since that's where i store all of my music, and for some odd reason it didn't work. i have a feeling it's because the night before i unplugged it without ejecting it. my mistake, i know, but now the drive is all messed up. earlier i was able to view the volumes on it in disk utility, and before deciding to erased anything i plugged it into my sister's dell where i transfered everything on the drive. now, when i plug it in my macbook it only shows up in disk utility without the volumes, it doesn't show up on the dell anymore, and when i go to erase everything it tells me "operation timed out".
i'm at a loss of what to do. i tried restarting the macbook, unplugged the cables... nothing seems to work. i would really like to get the thing back to factory settings if that's possible. so if anyone can offer help, it would be most appreciated. the external drive is a 500GB Maxtor OneTouch

Try this:
Extended Hard Drive Preparation
1. Open Disk Utility in your Utilities folder. If you need to reformat your startup volume, then you must boot from your OS X Installer Disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger or Leopard.)
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Set the number of partitions from the drop down menu (use 1 partition unless you wish to make more.) Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID (only required for Intel Macs) then click on the OK button. Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
If you plan to use this drive on both your Mac and a PC, then format the drive MS-DOS rather than Mac OS Extended.

External hard drive doesn't show up in /dev. [SOLVED]

After a long period of not taking backups, I plugged in my external hard drive today, but I can't mount it because I can't find it in dev (it used to show up as /dev/sdb, but now my only /dev/sd* is /dev/sda, which is my internal drive). The drive still shows up in dmesg and in lsusb. I've attached the dmesg lines and the lsusb -v entry, in which you can see that the drive is indeed recognized as a mass storage device.
I'm not sure if it's relevant, but lsusb -v pauses for a couple of seconds before outputting the final line.
Any ideas?
Dmesg output:
[160782.137424] usb 1-5.3: new high speed USB device number 7 using ehci_hcd
lsusb -v output:
Bus 001 Device 008: ID 059b:0370 Iomega Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x059b Iomega Corp.
idProduct 0x0370
bcdDevice 0.00
iManufacturer 10 lomega
iProduct 11 exernal hd
iSerial 5 1590925965FF
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 4 USB Mass Storage
bmAttributes 0xc0
Self Powered
MaxPower 2mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk (Zip)
iInterface 6 MSC Bulk-Only Transfer
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0001
Self Powered
Edit: fixed code tags
Last edited by jneem (2011-11-19 23:36:18)

So, you're talking about a specific drive.
then try testdisk. it's available in extra.
also you may try to use another cable.
Unfortunatly my system doesn't see any usb drives. But when I boot in stock kernel, everything is OK
PS a few months ago I have bricked my external hdd by inserting it in win7 by mistake. Billy's OS didnt recognised my ext3 partition, and destroed it without any prompt. B****! I still cant forgive it

External Hard Drive doesn't work after Time Machine cancelation

First post on the forum.
So far i've had 2 hard drives broken because of a simple Time Machine.
I own a MBP and an HP so my hard drives usually have 2 partitions, one for mac, the other for pc. About a month or so i was doing a Time Machine on my Iomega 1TB (the partition used for the time machine is formatted in Mac Os Expanded (with journaling)), and, because the time machine was extremely slow i stopped it. Then came the problems. I tried to connect the Iomega to the mac, but the partition in which i had the time machine doesn't mount. the other partition is mountable and i even managed to delete some files in it, so it worked. But now the partitions don't mount. I can still see the two partitions in Disk Utility, with the correct names i gave them, but cannot mount.
Right now i don't have the disk with me because i went to a "professional" to try and at least recover my files. What a joke that was. First they told me they had my recovered files and them the files were not mine. The switched the disks and gave me someone elses files. And now they ask me for 1100$ to recover my files because it is a hardware malfunction. Obviously i dont have that amount of money available and i cannot afford the recovery atm, and i do not believe that a software can cause hardware to fail. (just guessing)
Resume: 1 external hard drive, with 2 partitions, one mac os expanded and the other is a Windows NT Filesystem. None of the partitions are corrently mounting on mac but the disk utility recognizes the partitions and the names i gave them.
So guys can u help a poor little girl that needs her photographies so that she can go and show her portfolio to get a job. :/
Kinda desperate at this point.
ps: sorry for bad english, second language

One can't read the other.
Just to be clear Mac's can read/write FAT32 but windows cannot use OS X Extended. So to use a drive on both systems it needs to be formatted FAT32
FAT32 does have limitations and possibly the best solution is to use NTFS, a more modern, robust filesystem. The drawback here is that OS X does not natively read NTFS so a third party kernel extension is needed.

External hard drives won't mount after upgrading to Tiger 10.4.9. Help!

Hi, I've just got the latest iMac. Very excited! I did all the software updates, connected my Western Digital extended hard drive so that I could copy some files over onto my new Mac. It was fine at first. Then when I wanted to open up the external hard drive icon on my desktop again and double clicked on it, everything disappeared from the screen for a few seconds, then reappeared but my external hard drive simply opened the window to my personal hard drive on the Mac. The WD links to my computer via Firewire. I then connected my USB external hard drive stick and it was the same story.
I used Disk Utility to test everything and everything was fine.
I then reinstalled Mac OSX 10.4.8 and plugged in my external hard drives. Everything worked perfectly. After copying over documents and a couple of programs, and downloading a few more programs, I ran my software updates again, upgrading the operating system to Tiger 10.4.9. I attached my external hard drive and it was the same problem all over again.
I the read up the online discussions and also chatted to an Apple dealer, and their advice was to download the Intel Combo and reinstall the operating system. I have just done this and my external hard drives will still not mount properly. Their icons appear on screen but double click them and everything disappears.
Please help. This is really frustrating as I have a backlog of work to do and I seem to be wasting hours on this. Not only that, this is a brand new machine which I rightly expect to work straight away.
I look forward to your response. Thank you in advance.

Hi, try to put your HDD in other Mac and look if appear the same, also you can try to repair permission.

WD 400 GB external hard drive doesn't mount after software update.

I had been using my WD external hard drive with TimeMachine for almost a year. Just recently the WD doesn't show up on desktop, however you can see it under the Apple's "System Profiler". Any suggestions?
External HDD:
Removable Media: No
Detachable Drive: Yes
BSD Name: disk1
Version: 0.00
Bus Power (mA): 500
Speed: Up to 480 Mb/sec
Manufacturer: Western Digital
Mac OS 9 Drivers: No
Partition Map Type: Unknown
Product ID: 0x0900
Serial Number: 57442********************938
Vendor ID: 0x1058

c14user,
Looking back at your original post: "Partition Map Type: Unknown" is a little suspicious. I'm wondering if, while the disk was formatted correctly, perhaps the partition scheme was not changed from Master Boot Record when you first began using it. I made that discovering recently on a drive that I could no longer select as a Time Machine disk. If so you'll need to re-partition the disk either GUID or Apple Partition Map.
*_How Should a Time Machine Hard Disk be Prepared?_*
For Time Machine to work properly, the hard disk must be formatted “Mac OS Extended (Journaled)” and its’ Partition Scheme should be either GUID or Apple Partition Map.
Time Machine is incompatible with disks partitioned as Master Boot Record (MBR). Unfortunately, this describes nearly every hard drive you can buy because MBR is a Windows partition scheme. (Naturally, this DOES NOT apply to Apples’ Time Capsule.)
For some, Time Machine begins to perform as expected with a new external hard disk. But then the initial full backup or subsequent incremental backups fail. The user only later discovers the hard disk was still partitioned as Master Boot Record (MBR).
One article on Time Machine made this observation: “Virtually everybody will have to open Disk Utility and repartition the disk as APM or GUID. It doesn't really matter which one because the Time Machine disk will not be bootable anyway. APM allows a disk to boot a PowerPC, GUID allows the disk to boot an Intel processor but both are easily digestible by Time Machine on either kind of processor.” [http://www.girr.org/mac_stuff/backups.html]
Procedure
Connect the hard disk you wish to use for Time Machine backups.
Launch Disk Utility.
It will appear twice in the pane on the left. (Make sure you recognize that it is different from the 2 icons that represent your Macs' internal drive.) The upper entry represent the device as a whole, including the controller inside. The lower entry represents the hard disk contained within the device.
Click on the upper icon of the external hard disk.
Select the "Partition" tab.
For "Volume Scheme" choose "1 partition". (Chose 2 partitions if you intend on storing other data on the disk besides your Time Machine backups.)
Name the disk.
Format should be "Mac OS Extended (Journaled)".
Click "Options".
Select either GUID or Apple Partition Map. (See above for significance)
Click "OK".
Click "Apply". Then click “Partition”.
Once the external hard disk is repartitioned, select it again in Time Machine preferences and use it for your backups.
Let us know if this was helpful.

WD 320gb external hard drive doesn't show up on mac

I just bought a 320gb Western Digital external hard drive. When I plug it into my mac (OS X 10.4.11), nothing shows up on the desktop. I also don't see it anywhere on "Finder". When I plug it into my family's PC it works correctly and I can find the hard drive and put files on it. Any suggestions for being able to access the hard drive from my mac?
Thanks.

Prep the drive for the Mac:
Extended Hard Drive Preparation
1. Open Disk Utility in your Utilities folder. If you need to reformat your startup volume, then you must boot from your OS X Installer Disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger or Leopard.)
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID (for Intel Macs) or APM (for PPC Macs) then click on the OK button. Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.

External Hard drive doesn't show in the event library?

Would anyone know why my external HD mounts to my computer, yet does not show up in my event library window?
Thanks for any help.
Evan

johng67 wrote:
Hi Everyone,
FCPX won't list two of my 6 external hard drives in the Event Library, including my all-important video hard drive (a 2TB drive I use for my videos). There is absolutely nothing wrong with any of my drives. They work in Finder and in every app I have, and Disk Utility says that they are perfectly fine. These two drives show up as "Cameras" in FCPX for some reason. All the other drives show up fine in FCPX, even the drive I use for my Time Machine Backups. The two missing drives are formatted exactly the same as the drives that do show up (Mac Journalled) and they all connect through USB -- there is literally no difference between the drives, so there shouldn't be a problem for FCPX but there is.
Does anyone know why two drives don't appear in the Event Viewer (or appear as "Cameras") while 4 other drives appear perfectly well???
These drives either have names like "Video" or folders inside that are usually in camera drives, like "DCIM".
If you rename the drives or folders that are causing it, FCP X will see them as drives. No need to erase or reformat anything, just figure out what names to change: e.g., renaming a drive "Video" to "johng67 Video" may be all it takes.
Remember that for example an SD card from a camera that you plug in to your mac sd slot appears to the application just as a volume; if you copy it entirely to a pen drive or a large hard drive they would all appear the same.
FCP X has to apply some heuristics to try and figure out if it should treat it as a hard drive or a "camera". No such heuristics can be 100% accurate - that's why they're heuristics.
Message was edited by: Luis Sequeira1

External hard drive doesn't show up on Mac Mini

Working with pre-installed Snow Leopard on a Mac Mini.
External firewire hard drive does not show up on desktop or in sidebar. Also tried the same hard drive connected with USB. Tried another USB drive -- nothing.
What can I try?

If those have a pre-existing format that works with those earlier machines, they may not show as bootable drives....they need to be set up with a GUID map as mentioned. But they should still show up in Disk Utility at least...
If they worked on those other computers, then you should try the Apple article listed above to see if all that is needed is to get the FW ports to cooperate.
If no joy there, try resetting some of the basic hardware involved (PRAM~NVRAM). See this Apple KB for details, etc.:
http://support.apple.com/kb/HT1379
If still no joy, walk it in to the nearest Apple Store for a quick hands on.
Good luck in any case.

Need help: External Hard Drive doesn't show up

i havent use my external hard drive in 3 months. Before when i connect the usb, the hard drive shows up in the finder and i can transfer files and ext, but now it doesnt show up in the finder at all. I've check the disk utility and the EHDrive appears there, i've tried to click the verify and repair but it doesnt mount in the finder. I've also tried opening the HDrive in my player and it does open..
so please help me with regard to this ..

How is the drive connected to the computer? USB, Firewire......
Do you have another computer to see if the hard drive will mount there?
Restart the computer holding down the command - option/alt - P - R keys before the gray screen appears. Continue to hold until you hear the startup chime for the second time.
Reset NVRAM/PRAM
Disconnect the drive from the computer, shut it down for about 1 minute, connect it to the computer and turn it back on. While, doing that, restart the computer.
Try using another cable to connect the drive to the computer.

My external hard drive doesn't show anymore

Hello Everyone,
I hope you can help me. Today I wanted to put new data on my WD hard drive, I have it for almost a year and always worked fine (it's just USB, no power necessary). But my External HD was almost full so I deleted the "time machine" back-ups. Now, my Macbook Pro or iMac doesn't show my WD in Finder. I can find it in Disk Utility but only for a few seconds. Can someone please help me by giving some tips or own experiences? Thanks!

If you want LR to show the full path of a directory tree as it is on an actual drive, you are going to have to fool it into showing it to you.
a) Place a COPY of a photo, ANY photo, in the directory/folder that you want to show as the root of your folder tree in LR.
b) Using "Import Photos from disk" import ONLY the photo that you placed in the 'root' folder, by DOUBLE-CLICKING on it so that only it is imported.
c) After the import, your folder structure should now look the way that you want it to in LR, matching the actual drive structure from the root upwards.
d) Using LR, delete the photo that you used as a placeholder. The LR Folder structure should remain intact.

My external hard drive doesn't show up on my desktop screen

I have a 1TB external drive that connects by USB. I use it as a Time Machine and for other storage. It worked fine until a few weeks ago. Now, when I connect it, the drive starts spinning, but it doesn't show up on the desktop screen or in Disk Utility.
Other USB drives and devices work fine when plugged into either of my USB ports. Also, this particular 1TB drive works fine with my older MacBook. It's just that this particular external drive and this particular MacBook Pro don't seem to be working together.
Thoughts?

Does it show up in disk utility
remove and reconnect the USB connector on the drive end., check Finder > prefences > general ....is hard disks checked?
Have you used this HD on that Mac before?
Does this HD show in another machine/ Mac?
Work the process of elmination. Report back.

External hard drive doesn't show up in finder or migration assistant

Hello all,
I'm new to this forum and pardon me if this question isn't posted in the right category.
I recently broke my old macbook pro to the point it was inoperable. I extracted the hard drive which appeared to be in good shape, put it in an external enclosure & plugged it into my new macbook pro via usb and it's not showing up in finder, disc utility or migration assistant. I'd like to import my old music, pictures & documents if possible. I'm curious why it isn't showing up and how I can make migration assistant work?
Hope everyone had a good Christmas and a happy new year!
Thanks,
Andrew

Disk Utility – Force Mount Disk
See mount section.
Disk Unmount Using Terminal

External hard drive doesn't show after upgrade to Yosemite

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