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

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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.

My external hard drive will not mount on the desktop?

My external hard drive no longer mounts on my desktop, the hard drive has been checked & is working-has anyone ideas?

Hello cuckoo55,
Thanks for using Apple Support Communities.
For more information on this, take a look at:
Mac OS X v10.6: How to show your hard drive icon on the desktop
http://support.apple.com/kb/HT3746
In the Finder, choose Preferences from the Finder menu.
Click the General icon on the toolbar.
Select "Hard disks" in the "Show these items on the desktop:" section.
Close the Finder Preferences window.
Best of luck,
Mario

Hard drive will not mount after optical drive upgrade

I recently performed an optical drive install. Had to remove the hard drive bays (I use three hard drives - Luckily, 2 run OSX).
I carefully removed all three drive bays and the empty bay. When I inserted the drives into the computer I had changed the position, swapping one OSX drive with a different one and reversing the drive bays. On restart, the computer started on the drive I had not selected for startup and I received an error message stating the other drive could not mount and it gave three options (Initialize - Ignore and Eject).
I can see the drive in Disk Utility and repair the permissions (it's also located in the System Profile).
I tried a few things I read in the community using various Terminal commands but was unsuccessful.
(Let me point out that I recently switched from a PPC G5 to MacPro and swapped the drives from PPC into MacPro and all has been fine until I removed changed their positions in the bays)
Any suggestions/help would be greatly appreciated.

I would recommend you reformat your drives that you brought over, and if possible put in a Firewie case.
Swapping drives will normally not matter but you should use Startup Disk to reset the default after using Option key the first time.
Putting in an optical device shouldn't require removing the drives to get the cage loose and let you put in a 2nd superdirve.
G5 used APM partition map, Intel Macs use EFI and requie GPT/GUID.
A drive with just data should not matter but that is not fool-proof either.
A drive iwth the system from a G5 though can.
During startup the boot process scans all volumes and looks for systems and mountable volumes.
Pull all the drives except the one with OS X that you were using, and put that in bay #1.
I've moved arrays between bays and that never "broke" the array or had trouble mounting and using (even moving to ODD ports).

External hard drive does not mount after sleep

I am using a brand new Seagate 2 TB external hard drive for my backup drive. More often than not, when the computer goes to sleep, the icon for the drive is gone from the desktop when the computer wakes up. I have to unplug it from the computer and reconnect it, then it mounts and works fine. I have it plugged directly into the computer's USB port. The drive uses USB3. As far as I can tell, it does not exceed the power requirements of the USB port. It is the only external hard drive I am using at the moment.
I should note that the same thing was happening with my last hard drive. That was a Western Digital 250 GB drive with an independant power source connected by firewire.
I am running OS 10.6.8 on an Intel circa 2009 iMac. My external drives worked fine for years, and it seems in the last year or so is when this started happening.

r_dizzle wrote:
Another point of note is that both the HD and the keyboard are connected to the iMac through a 7 port USB hub.
I think this might be the issue. If the iMac is waking back up, it will likely be waking up this HUB, but the HUB might not be re-initialising the connection between OS X and the external drive or the keyboard.
After waking the iMac, if you unplug the external drive from the HUB, then plug it back in again, does OS X pick it up again? Have you tried plugging the external drive directly into the iMac and then testing what the result is?
If you read back on what you've said, you pointed out that you have a USB mouse that you use to wake the iMac from sleep. Is this mouse directly connected to the iMac? If so, it surely can't be a coincidence that a directly connected USB device can wake the iMac from sleep, but any USB devices connected to the iMac via a USB HUB cannot.
I would suggest you test the drive as it is directly connected to the iMac. I would complete the same test with the keyboard too. I think you'll find it's the USB HUB.
I hope this helps.

External Hard drive will not mount on desktop

I have a 17" Powerbook G4 that has replaced a broken iBook G4. I've been using a Western Digital MyBook Pro Edition as a secondary drive for my multimedia as well as my iTunes Library. It worked fine on the old iBook.
When I plug it into the Powerbook, using either USB2 or Firewire 800, it will not mount to the desktop. It DOES however appear in the System Profiler as "External HD Button and Lights". The drive is formatted for FAT32 and works fine on my Windows XP desktop machine, so I know the drive functions mechanically. A different hard drive, a Maxtor mounts to the desktop fine using USB2, so it isn't a bus issue.
This is driving me nuts. I LOVE this computer, but I have WAY more invested in music than the cost of the computer.
Thanks in advance.
Message was edited by: hempomatic

It took a while to figure it out but apparently there was a conflict with bluetooth. I disabled it and all is well.

Problems with External Hard drive, will not mount and errors in disk utilit

i have a powerbook g4 aluminum. i have an external hard drive for it. a simple tech 100gig portable drive, almost brand new. i dont know what happened to it, but one day i was starting my computer up with it attached. it wounldnt fully start up, said "waiting for local disks" so i uplugged the external hard drive. now it wont mount and will only show up in the disk utility of my friends macbook. i tried to verify and repair, and this is the message i got.
Verify and Repair disk “UNTITLED”
** /dev/disk1s1
could not read boot block (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
Im in mexico writing a book and so i really need help on this one guys.

Hi, hjbugs, and welcome to Apple Discussions. Disconnecting the drive while your Powerbook was accessing it probably caused your problem. It may be repairable using DiskWarrior or TechTool Pro, but if you don't have access to one of those and aren't going to buy one, reformatting the drive with Disk Utility may be the only other way to make it usable again. If it contains data you need to recover first (i.e., data that isn't also stored on your internal HD or other storage media), download the free demo version of one of the data recovery utilities mentioned in this thread and use it to see what is recoverable. If the files you need are recoverable, buy the full version of one of the utilities and recover them.

External hard drive will not mount nor repair... ='(

My internal hard drive was failing, so I backed up all of my data onto a 500GB WD Passport external hard drive and ordered a warranty replacement. Yesterday I received the replacement and went to restore my data. I used Carbon Copy Cloner to restore it and after about 45GB, my computer completely froze. I restarted and tried again, this time the same thing happened at the same point. I restarted, but this time it would not boot off of the external HD. I booted off of another external HD and ran "Repair Disk" in Disk Utility. It took forever, but when it finished it said something like I need to backup, erase, and restore. The problem is that I can't access any of my data on the drive!
Is there any program I can use to repair it? Or is there any way to force it to mount?

Varlos wrote:
My internal hard drive was failing, so I backed up all of my data onto a 500GB WD Passport external hard drive and ordered a warranty replacement. Yesterday I received the replacement and went to restore my data. I used Carbon Copy Cloner to restore it and after about 45GB, my computer completely froze.
I won't try to answer any of your questions, but I do have a set of my own: How did you initialize that replacement drive? Did you set the partition map scheme to "GUID Partition Table"? Did you format the volume as "Mac OS Extended (Journaled)"?

External Hard drive will not mount on Macbook Air (mid-2011) OSX 10.9.4

Hello Everyone!
Needs some help resolving this issue. External hard drive (Toshiba v63600-C) will not mount anymore on my mothers-in-law's macbook air. She notice this problem starting on the Aug 6th. You can see it in the Disk Utility but is not mounted. I can get the her ext hard drive to mount on my Macbook Pro with no problem. I also tried my personal ext hard drive (Seagate) on her Macbook Air and it will not mount. Not sure what is going on here. Any help is appreciated in resolving this issue.
Disk Utility
Mount Point : Not mounted Capacity : 1 TB (1,000,096,367,104 Bytes)
Format : Windows NT Filesystem (Tuxera NTFS) Available : -
Owners Enabled : - Used : -
Number of Folders : - Number of Files : -
Actions Taken So Far:
1) Confirmed "external disk" is selected under Finder's Preference
2) Reset PRAM
3) Ran Verify Disk and Repair Disk under Disk Utility with no change.
4) Tried manually mounting disk in Disk Utility but get "Mount Failed" error

You may believe this is Apple's problem but I just like Baltwo have had absolutely no problems with any of my Firewire drives in Lion. So unless you can come up with much stronger evidence to the contrary, I doubt that your feeling are going to carry any weight at all.
Allan

External Hard Drive will not mount

My external hard drive that I been storing all my aperture files on is not mounting to the desktop. I can see the hard drive when I use my disk utility, but it doesn’t show up in the desktop.
When I purchased the hard drive originally I didn’t format to apple but it worked fine.
Please help…
Jethro Acosta
Infocus Studio
Imac with intel chip Mac OS X (10.4.4)

Make sure the drive is powered from from its separate power source, not solely through the FW or USB connection.
If it is a dual connectivity drive, try connecting from the second method (e.g. if you are using the much preferable FW, try switching to the much-less-good USB).
Repair Permissions, even though that is fairly unlikely to have any impact.

External Hard Drives will not Mount

I have a WD & LaCie external hard drives in my iMac G5 they have been working fine until I started using the new Time Machine program. Now the drive show up in disk utility but not on the desktop. Disk utility has been no help in repairing them and in its log states " Invalid content in Journal " .
How do I get my drives back ?

I did an archive reinstall of Leopard and I still had my problem, so I schleped it down to the Apple store and for the life of me We could not make it happen, drives shoed up fine and worked fine. I think I have a bad FW port that is intermittant but for now I cannot have them fix something that seems to work...
I dont thisnk we have the same problem, because when I had my drives not showing up on the desktop, they were not showing up in Disk Utilitiy either.
Is there data on those drives that you must have? If not I would try reformatting them with Disk Utility ("erase") and see if they reappear. If there is data on them, I would try running a better utility program such as DiskWarrior, I think you can run it on external Disks to rebuild the directory. The problem is that the present version, 4.0 is not compatible with Leopard. The new one is out soon if not already for Leopard. There is no guarantee that that will work, but may be worth a try.
http://www.alsoft.com/
roger

External hard Drive will not mount via firewire tpo my Powerbook G4

I have a Powerbook G4 1.5, 2 Gb Ram and an 80 Gb Hard Drive. Well my problem is, I went and purchased a Western Digital External Hard Drive. The box states that this hard drive is compatible for both Windows and Mac. But for some reason I can't get the external hard drive to mount via the firewire. However it will mount by using the USB.
So can someone please provide some troubleshooting tips on how I can get this external hard drive to mount?
Thanks

hi there,
in your case, your drive is probably bad because the copy was interrupted. your hard drive may be finished, but more likely, just the file structure is damaged and/or you have bad sectors.
you have a few options:
*if you don't need the data back:*
• see if the drive appears in disk utility and try to erase/reformat (make sure to zero out data to avoid bad sectors)
• if it doesn't appear, try a pc. it won't recognize it, but it may allow you to reformat/initialize it. then, connect back into mac (which will recognize a pc formatted drive) and reformat as mac os x extended (journaled).
*if you need the data back:*
• try a program like data rescue II, file salvage, or boomerang data recovery first to recover the data
• see if the drive appears in disk utility and try to repair disk
• if that doesn't work, try disk warrior and/or drive genius
• if you aren't successful, you may want to try a professional data recovery service (or me first, to ensure that you actually need someone as high tech as drive savers)
• if you are successful and are able to recover the data, then erase the drive (zero out data) and then move the data back, to ensure you're working off a well formatted drive.
fyi, if your computer freezes in the future, be sure to try appleoptionesc first and force quitting the problem application. if that doesn't work, try controloption+appleeject (shutdown) and/or optionappleeject (restart). if those doesn't work, in this situation, the next best move would probably have been turning off the power on the hard drive. if that doesn't unfreeze the system in a few minutes, then hold the power button.
hope this helps,
brian
corewerkz/briancometa.com/

LACIE external hard drive will not mount

I had this problem with Tiger too. I have to turn the LaCie external hard drive on and off 4 or 5 times before it appears on my desktop. This shouldn't be right! Can I do something about this???

Another Lacie issue (lacie 250 d2) . Similar the others. WHen I installed leopard it asked if this was the drive to use etc and i said yes. Since then it wont work. All attempts to back up have failed. I cant reformat either. Just get beachball when ever I try anything with the disk. Only way to do anything is to remove the FW connection. Tried the drive on another G4 (tiger) and it scanned and reported "disk seems ok" but then any attempt to write to the drive or any other activity is greeted with beachball.'
Rang the distributor and was told " we are having some issues with lacie and we are losing confidence ... would you like to buy a western digital" !!!

External hard drive will not mount properly

I have a 250GB western digital 3.5" hard drive in a IDE enclosure connected to my macbook through USB. I have used this setup for about a year now and have not had any problems up until recently. i upgraded to leopard last year, and i used this hard drive at one point as a time machine backup. i then erased all of my backups and used it to store regular data because i needed the extra space until i could transfer everything to DVD. anyways, the drive worked ok after that for about a month and then one day it stopped showing up as a volume on my desktop. when i plug it in then nothing at all happens. the drive appears in the disk utility but i cannot edit any features or preform first aid on it. when i unplug the drive i get these two horrible processes in activity monitor that use up 100 % of both my CUPs. they are
syslogd
mount_hfs
i then have to force my computer to restart because it is breathing so loudly and heating up so much. anyways... i have tried running drive genius 2 but it doesnt recognize the drive either.
other potentially useful information
- FAT file system
- does not work with windows (although windows does recognize the fact that it is connected.... does not appear in my computer directory)
i would like to recover the information from this harddrive without formatting it. i would really appreciate it if anybody could offer me some advice that will solve my problem

I can't offer any help regarding the problem you describe, but from reading your post, it seems the drive is formatted as FAT. Since you posted this in the Time Machine forum, I should point out that you can't use a FAT formatted drive with TM. It's strange that you say you used the drive for a while with TM. That can't be, unless TM reformatted it without you realizing it (TM will offer to prepare the disk the first time you try to use it with TM, if it's not properly formatted for TM, and this results in a reformat). But perhaps you reformatted it as FAT after you stopped using it with TM.
At any rate, as for your current problem, you might post that in some other forum, as TM probably has nothing to do with this situation. You may have better luck getting help in the "Using Mac OS X Leopard " forum - just a suggestion.

My external hard drive will not mount

I unfortunately committed the cardinal sin and forgot to eject the hard drive instead I just unplugged it now it won't mount on my desktop I have a previous generation macbook pro and have tried it on windows on the macbook pro and windows on a pc no luck with any of them I am not to concerned about the data I just want to get the drive usable again.
Could anyone please help me out?

Chad: You'll need to use data recovery software to see how much of your data can be salvaged from the drive. Each of these DR utilities is available in a free downloadable demo version that will show you what the full version would be able to recover before you have to pay for anything:
Data Rescue
FileSalvage
VirtualLab
Note that you will need to have another hard drive with enough available space on it for all the files you want to recover. Nothing can be recovered and saved to the same drive it's being recovered from.

External Hard Drive will not mount after upgrading to Yosemite

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