160 GB external USB HDD won't mount in 10.4.9; does in 10.4.0

I'm using a Beige G3 (though I don't think the model is the issue).
I know there's nothing wrong with the drive whatsoever, because it mounts on PCs, and it mounts when booted from both other hard drives on the system, on Mac OS 9.2.2 and Mac OS 10.4.0.
I know it used to mount on 10.4.9, too. I thought maybe when I installed a 4-port USB 2 card things would resolve, but they haven't.... so I expect it's a driver (extension) issue.
I deleted a bunch of extensions a while back that I was sure I didn't need... I suppose it's possible I deleted one vital for USB HDD support on the HDD using 10.4.9, only I don't know which it would be... things were self-explanatory in the days of OS 9, not so much with OS X, it would seem.
I didn't notice it until fairly recently since I'd been networking to the external HDD via another computer as the built-in 10BT was sadly faster than the USB 1.1 card I had installed prior.
Anyway.... since I assume this is an extensions problem (it says when I turn on the drive that a certain extension is missing, but I can't remember which), can anyone tell me what particular extension it is that enables USB Hard Drives?
By the way, USB flash drives mount and run at USB 2 speeds just fine. Thanks.

It's an adaptec card, but that's actually not the issue; it stopped working on the old USB card where it'd worked just fine before, whilst still working when I booted into 10.4.0.
Once upon a time it was working fine on both 10.4.9 and 10.4.0.
It now says "AppleXsanFilter.kext" was installed improperly and cannot be used" when I start up the drive. It knows it's there, it just can't access it. It then says "device was improperly removed" when I shut off the HDD.

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External USB drive won't mount after 10.9.5 upgrade

Is anyone else reporting the following issue? Immediately after installing OS X update 10.9.5 (13F34) on 09/18, my external USB drive (IOMega 1GB OS X Extended FS) used for Time Machine would no longer mount and isn't recognized. When I look at the drives in finder, it is missing. However, it does show up under the USB Hi-Speed Bus device tree:
USB Mass Storage:
Product ID:    0x0376
Vendor ID:    0x059b (Iomega Corporation)
Version:     0.00
Serial Number:    ABCDEF012314E2ED
Speed:    Up to 480 Mb/sec
Manufacturer:    Iomega
Location ID:    0x1a120000 / 3
Current Available (mA):    500
Current Required (mA):    0
Console message when device plugged in:
10/6/14 3:22:31.000 AM kernel[0]: USBMSC Identifier (non-unique): ABCDEF012314E2ED 0x59b 0x376 0x0, 2
mount command results:
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
/dev/disk1s2 on /Volumes/Mac-Mini 2 (hfs, local, nodev, nosuid, noowners)
System is Mac-Mini (late 2012), 2.5 Ghz i5, 8GB ram, 500GB local storage, 1TB on second Firewire disk for media, 1TB USB disk for Firewire (PROBLEM)
I have reinstalled the combined 10.9.5 OS upgrade, and verified that the drive works when connected to my other MB Pro (mid-2012 running Yosemite beta 3). There is no third party software that I'm aware of in use for this drive, as it's only for Time Machine backups.
Thanks

Is the drive's icon on the desktop (perhaps behind another icon, which is possible if Finder > View > Cleanup is enabled)?
If not, is the box Finder > Preferences > General > External Disks checked?
Is the drive listed in every Finder window's sidebar?
If not, is the box Finder > Preferences > Sidebar > External Disks checked?
Are Time Machine backups to the drive happening on schedule?
If not, does the drive appear in System Preferences > Time Machine > Select Disk?
Can you open /Volumes/Mac-Mini 2/Backups.backupdb using Finder > Go > Go to Folder...?
Does the drive appear in Disk Utility? Is it (or can it be) mounted there?
Have you tried to plug it in to a USB port on the Mini (not a hub) or into a different USB port on the Mini?
Have you tried this: shut down; unplug the drive; boot the Mac; after you have logged in and the Finder is done populating the desktop and menu bar, plug the drive in?

External USB drive won't mount without running Repair Disk

I have a Seagate external USB hard drive. It's a 1TB FreeAgent drive that's USB powered. I use this to share data across several computers. Every time I connect the drive to my MacBook Pro, it does not mount. If I try to mount it, I'm told to "try running first aid".
So, I run repair disk, and then it will mount. I just did this, and Repair Disk reported "The volume /dev/disk1s1 appears to be OK".
Any help on this matter would be appreciated. It is formated NTFS, and I have an NTFS driver installed, if that makes any difference.
Thank you!

Is the drive's icon on the desktop (perhaps behind another icon, which is possible if Finder > View > Cleanup is enabled)?
If not, is the box Finder > Preferences > General > External Disks checked?
Is the drive listed in every Finder window's sidebar?
If not, is the box Finder > Preferences > Sidebar > External Disks checked?
Are Time Machine backups to the drive happening on schedule?
If not, does the drive appear in System Preferences > Time Machine > Select Disk?
Can you open /Volumes/Mac-Mini 2/Backups.backupdb using Finder > Go > Go to Folder...?
Does the drive appear in Disk Utility? Is it (or can it be) mounted there?
Have you tried to plug it in to a USB port on the Mini (not a hub) or into a different USB port on the Mini?
Have you tried this: shut down; unplug the drive; boot the Mac; after you have logged in and the Finder is done populating the desktop and menu bar, plug the drive in?

Any fix for external Iomega HDD won't mount to iMac OSX 10.8.5 Desktop?

I have a 750GB Iomega external HDD that I've used for several years to back up my iMac (OSX 10.8.5) with Time Machine. No problems. Computer locked up while searching on the internet last night, requiring a restart. The external HDD never came back up on my desktop, It has power and all cable connectors are tight. The disk powers up and runs, but it just repeats its attempt to mount over and over, but won't show up on the desktop. So I can't run Disk Utility or any diagnostic software, since it isn't accessible form the iMac.
Any suggestions? I'm guessing my only option is to bite the bullet and buy a replacement backup hard drive, and start over from scratch in Time Machine. My attempts to look for help on the Iomega site have been frustrated by the new post merger Lenovo-EMC based site. Practically no references found to Iomega at all!

Yes, I checked that, and I tried restarting the computer with the HD turned on, then again with the HD turned off until after the computer finished booting up before turning the HD on. Nothing has worked to get the externa; drive to show up on the desktop. Thanks for replying. I'm not holding out much hope that the drive is going to work again. I'm on my way out to pick up a new backup drive. I figure I'll get one that is at least a TB, and 3.0 USB capable so that when the time comes that I replace my old iMac, the new drive will at least be able to back up the new equipment.

Updated now external boot HDD won't mount!

I have been running Mountain Lion from an external WD Passport USB 3.0 HDD as I am not rapt in it, just want to access iBook occassionally and other ML only software.
It had 10.8.2 installed and mounted and ran fine.
I applied the OS X Mountain Lion 10.8.2 Supplemental Update 2.0, assuming it probably was advisable for security and stability.
When I rebooted after the update my Passport hard drive won't boot/mount. It refuses to mount until I have started up from my internal HDD, pulled the USB cable and then reinserted it.
I have repaired the HDD with Disk Utility although nothing was reportedly wrong with it and other than multiple attempts at trying to restart and force it to boot by both using the Startup Drive in Systems Preferences and holding down the Option key, I am getting nowhere.
Has anyone any suggestions of anything else I can try?

2 Internal in iMacs and 1 External, brand new. The Internal Seagates were what caused Apple to have a recall a couple of years back.
Seagates I've noticed are noisy, making chugging and clicking noises. Quite irritating.
Peter

External USB HD won't mount anymore

I have a 1 TB HD that has all my media on it and today it's not connecting. In the past there have been connection issues such as:
when I brought my computer and external to a friend's house it wouldn't mount at first, and after restarting a few times and trying different USB ports it finally did mount. This problem persisted everytime I restarted my mac (iMac G5), and I realized that the problem was independent of which USB drive I used. Anyway, the HD would usually mount after a few minutes. It was mounted last night before I went to sleep. I woke up this morning and entered the password to come back from my screen saver and it wasn't on my desktop. I can't get it to mount and it isn't being recognized in the disk utility or system profiler. I've tried restarting mac numerous times, disconnecting/reconnecting the USB chord, restarting the external, but it still won't connect. Has anyone else had a similar problem or know how to help me!?

Have you tried using a different cable? Are you sure the power brick is working? Try disconnecting all other peripherals and then connecting the external.

LaCie USB 160GB HDD won't mount, just beeps

Purchased a new 160gb LaCie external USB HDD, but can't get the mac to recognise it. I have tried it with and without the additional USB power lead, but nothing happens. The HDD just constantly beeps.
Not sure what to do. We have tested it on other macs (laptops & desktops) and it mounts straight away no problems. The USB ports work for other things fine.
Any suggestions would be appreciated.
Thanks

Welcome to the Apple discussions.
Powerbooks often don't put out enough juice on the USB port to power external hard drives. The external drive may not start up or may start but still not be recognized by the system. One solution is to get a power adapter, as Hardy recommended, or, if possible, to use a Firewire connection (Firewire doesn't have the power issue USB has). There's also an advantage to using a Firewire connection, in that Powerbooks can only boot from a Firewire device. So, a USB only hard drive, once it starts up, is fine for backup but cannot be used to boot the system, if needed. Lacie sells a power adapter for around AU$25.

External Buffalo HD won't mount after update to 10.5.7.

As the title suggests, I have a 250 GB Buffalo external HDD connected to my mac mini (2009). I did the update via software update & after the restart the external HDD won't mount. Any ideas anyone please?

Not exactly a Buffalo drive, but my problem seems very similar, and I'm convinced it occurred after a recent operating system update.
I have a Tascam DP-01FX that I use infrequently and that functions perfectly. I have used the USB connection to transfer files back and forth to three computers; and old G4 Mac (now out of commission), a new iMac (running OS 10.5.8, and an old Dell Inspiron 5000 (running Windows XP). The last time I tried to connect it to the iMac, the System profiler indicated it was connected, but it never mounted on the desktop, and it could not be made to appear in Disk Utility. I tried all varieties of connection; through a high speed hub, directly to the computer (with ALL other USB devices disconnected including the keyboard), etc. I zapped the computer's PRAM, verified and repaired permissions on the system drive. I even unplugged the computer and everything connected to it for half an hour, then reconnected and zapped the PRAM again. Nothing I've done will make the Tascam device mount on the desktop. However, it mounted with no problems on the old Dell Inspiron 5000. The kicker is that I've successfully and easily used the DP-01FX on the iMac on a previous occasion. All this leads me to believe there is something in an Apple software update that is causing this problem. All other USB devices work flawlessly, including an external hard drive that I only use for special projects about once a week. It mounts and un-mounts without any problems. This has got to be an Apple "oops."

External Hard Drive Won't Mount- Need to recover files

Hello Everyone,
I am hoping that one of you fine mac experts may be able to assist ~
Problem: External Seagate FreeAgent Desktop USB external hard drive
won't mount on desktop=ie: no access to my important files.. Please Help!
Details:
External seagate freeagent 500 GB Desktop USB HD ( only 2 months old)
(using for document / file backup-not as a startup disc)
on my Mac G3 350 MZ Blue & White Tower /768 ram/ running OSX 10.1.5 & OS9.2~
~
Problem: Started using the external 500 GB HD 2 months ago -with no problems-until this morning. Tried to double click to open it to access files
and got the "beach ball of death" and needed to restart.
My trusty G3 started up fine, however, the external HD was now
not showing up on the desktop as normal. I troubleshooted -by restarting,
trying different a/c plugs/ different USB ports , ran disk utility..called
seagate -not much help . Seagate said to try the HD on another mac-which I did-
a G5 tower- same problem.
~
The External hard drive will show up in disk utility, but is grayed out.
and when click "mount" same two messages keep showing:
message 1: "a disk attempting to mount as unknown has failed verification or has failed to
mount.please use disk utility to check the disk"
~
message 2- when unplugging and repluggin the usb in-and upon
restart:" you have inserted a disk containg no volumes that mac osx
can read to use unreadable volumes,click initialize to continue with the disk inserted ,click continue"
~
( I really need access to these files- and do not want to re-initialize the HD!!)
I ran Disk Utility /first aid "verify & repair , the following info came up:
Repairing disk "main backup 2007 ".
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Invalid key length ( <<<IN RED )
Repair completed. "
~~
Though it said the repair was completed, the "invalid key length" issue
still comes up when re-running disk utility...Hard drive would still not
mount on desktop-even after restarting .
~~~~~
If there is a mac genius out there that can help?- it would be greatly
appreciated. I have tried to call seagate several times in the last several hours-
1st time-they disconnected me after being on hold 10 minutes-2nd call
I was put on hold for 40 minutes ..Finally spoke to someone ( they are not mac users or mac experts!)and he said I would need to send it to Seagate's Data Recovery-... for a fee of course!
~~~
At this point, I am hoping to just get the files and photos off
the hard drive- I heard about Disk Warrior-should I use that and if so
what version?
Thank you very much!
L

Will zapping the PRAM be of any use in getting the external to mount on the desktop?
Your external Hard drive is already recognized. But it cannot be mounted on the desktop due to its directory damage. You can certainly Zap the PRAM, and it will not hurt anything, but I am skeptical that it will change the situation.
Do you think the Disk Warrior 4.0 cd will even work on my G3 350MHZ running Mac OS 10.1.5?
If you boot from the CD and run it from the CD, absolutely yes. If you attempt to INSTALL it from a download or a CD, probably not.
Have you ever used Disc Warrior and is using it complicated?
I own and use Disk Warrior. You select the drive to be rebuilt, it builds a proposed new directory from the information and file fragments available.
When complete, it will provide a list of problems encountered, tell you what files have been placed in the "Rescued Items" folder, and allow you too look at your drive using the proposed new directory. Your only decision is whether the new directory seems to be an improvement over the old \[in your case, hopelessly corrupted] directory. You then tell it whether to replace the old directory with the proposed new directory, or to abandon its work and leave your Hard Drive unchanged.
Is there a good chance that the ext HD will still have my files on it- or do you think from what I've described that they are gone ?
From what you have described, your files are very likely to still be there. Sometimes in a situation like this, a handful of files cannot be recovered.
My other thought was to take the external HD there and have them try to recover the files.
Make sure you completely understand the costs involved. File recovery using a service like DriveSavers can run into many hundreds of dollars. They are prepared to disassemble your drive in a clean room and replace controller boards and read/write heads to achieve success. Your drive has serious, but not fatal, Directory damage. The Hardware, and most of your files, are likely just fine.

External hard drive won't mount, even after disk repair.

My Toshiba external hard drive won't mount on my MacBook Pro 10.8.5. I can see it in my disk repair, and when I repair, "the partition map appears to be ok." But I can't access the icon to be able to open the hard drive contents on my desktop. Help!

Hello maccynicwhoalwayshasmacs,
Thanks for the question. After reviewing your post, it sounds like trouble with an external HD mounting. I would recommend that you read this article, it may be able to help you resolve or isolate the issue.
USB and FireWire Quick Assist
Thanks for using Apple Support Communities.
Have a nice day,
Mario

3 mem stick in dual mode - how high + external usb HDD boot question

Hi guys. I have 2 questions:
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well, one thing is sure, you won't get dual channel if you use 3 memory sticks. the problem is that sometimes you cannot even boot with 3 modules installed. check the mobo manual on the possible memory modules configurations

Finder crashes when I try to open my external USB HDD

Hello all. I have been experiencing issues with my external USB HDD (WD Passport) and my Macbook Pro (Summer 2012) for some time. It looks that the HDD shows up on the desktop when I connect it but when I try to open the My Passport icon on the desktop Finder crashes. Finder works OK generally and I can see everything (even the Passport listed) but I cannot access the Passport HDD contents.
I have tried accessing it via terminal and managed to view the Passport contents ok (ls -ltr etc)
I have tried repairing the disk but the issue remains.
I have connected Passport to a Windows 7 PC and it works OK. I have even tried repairing it on a Windows PC but it has not helped.
Ejecting, rebooting etc does not solve the issue
Every time the issue occurs I see a PM Report Crash for Finder
11/24/13 5:46:21.004 PM ReportCrash[1374]: Saved crash report for Finder[1377] version 10.8.3 (10.8.3) to /Users/Panos/Library/Logs/DiagnosticReports/Finder_2013-11-24-174621_Panos-MacB ook-Pro.crash
Could you please suggest any solution to this problem??

Try booting into the Safe Mode using your normal account. Disconnect all peripherals except those needed for the test. Shut down the computer and then power it back up. Immediately after hearing the startup chime, hold down the shift key and continue to hold it until the gray Apple icon and a progress bar appear. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. When you reboot normally, the initial reboot may be slower than normal. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart by using the application un-installer. For each disable/delete, you will need to restart if you don't do them all at once.
Safe Mode
Safe Mode - About

External HD's won't mount (& more) after update to 10.3.9

I updated from OS 10.3.2 to 10.3.9 using the Apple updater utility. After the update, external hard drives won't mount unless they are on when I boot up the computer.
Also music cd's won't mount, but data cd's do. The only way I can eject the music cd's is to shut the computer down or use Toast in copy mode. For some reason Toast can "see" the cd.
Also I was running Firefox 1.5.0.7 and Mozilla 1.7.13 when I updated. Now Firefox and Mozilla won't open. I had them in the dock and now clicking on them gets a question mark. I tried downloading Firefox 2. and when I double click the .dmg file I get a warning box saying that the disk image failed to mount because of "error 536870208". I get the same error message when I try and open the .dmg files for the older versions.
Do I need to wipe the hard drive and reinstall everthing? I hope not.
Thanks for any help,
John R

No. DVD's mount and work fine. Music cd's are the only ones that won't mount, and they don't get kicked out.They just sit in the machine. They are not damaged when I do get them out.

Question on Time Capsule and external USB HDD

Hello everyone,
I have a 500GB Time Capsule that is working wonderfully. I recently have been downloading a number of large .iso image files that are taking up a lot of space on my internal drive on my Macbook Pro. I do not back these files up on the Time Capsule as it is getting full and i want it to backup other more important things.
I do however wish to backup these files. My current desk is rather full and really will not allow me to purchase a large 3.5" HDD and plug it in USB.
Is it possible to plug an external drive into the back of the Time Capsule and have it be used as a wireless disk as well?
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All you need is an external USB HDD. It needs to be formatted HFS+ (Mac OS Extended - Journaled), if you plan on a future Time Machine Disk on this drive, or FAT/FAT32. You could get a NAS, but you don't need to if you already have TC. Can I assume the USB port is free or do you have a USB printer hooked up to it?

I am connecting an external USB HDD and I can see it on my Apple Macbook Air. BUT this drive is READ only. How can I write to it?

I am connecting an external USB HDD and I can see it on my Apple Macbook Air. BUT this drive is READ only. How can I write to it?

Drive Partition and Format
1.Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. 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. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) 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.
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160 GB external USB HDD won't mount in 10.4.9; does in 10.4.0

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