Flash drive won't mount on iMac but mounts on all other computers

I have two new PNY 8GB flash drives and both work on a Windows 7 laptop and two different Macbook Pro computers. One Macbook is running 10.6 and the other is running 10.7. Two other flash drives work just fine on the iMac but these PNY sticks do not.
I have restarted the iMac with and without the sticks plugged in.
I have tried all USB ports.
I have tried Disk Utility but I do not see anything on the left.
I have look in /Volumes and I don't see the USB stick.
What am I missing? Why won't it work on the iMac but works on the Macbooks?

My other USB memory sticks, an iPhone, and two iPods work normally plugged into the USB connectors on the iMac. It is just this one brand of USB sticks that don't work on the iMac BUT the same sticks work on two different MacBook Pro computers and even a Windows 7 computer.

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Usb flash drive won't mount in disc utility

running mountain lion on new imac .... usb flash drive was working, the next hour inserted it again and it doesn't show up in "devices". Opened disc utility - it shows up there but won't mount and all the "verify disc" and repair disc" functions are greyed.
Same result when I insert it into my macbook.

Did you put it in another computer and save data to it since it last worked? did you properly eject the disk?
sounds like you need to reformat the flash drive
If you need to save the data , plug it in to a pc and see if you can copy to hd.
Then take to your Mac and format it in disk utility. I recommend using windows format.
Then plug in to your PCM and get the files.
Then.. Eject the USB disk, don't just pull it out. Take to your Mac and it should mount

USB flash drive won't mount

I have a strange problem with a USB flash drive which refuses to mount on the desktop of my MDD FW800. It registers in System Profiler but not in Disk Utility. I can't get it to mount using Terminal either. The Terminal screen says it has mounted but it doesn't appear on the desktop and I can't access it. However, if I do a restart with the the drive plugged in, it does mount. If I eject it and then try to plug it in again, it won't mount! Very frustrating.
It works fine on my Powerbook and my Digital Audio so it can't be the drive itself that's the problem. Not quite sure when this started but it may have been after I installed a PCI USB2.0 card (a Ratoc Rex-PCIU3). The card itself works fine with other USB products and I don't have any deep sleep problems with it either. I'm stumped.
Any suggestions anyone?
Alex
G4 1.25GHz Dual MDD FW800; G4 Digital Audio; Powerbook 800MHz DVI Mac OS X (10.4.8)

Hello rickame
Click on the desktop then go up to the menu bar and select Finder / Finder Preferences / General and make sure the box's are checked for Hard disk, External disks, etc.. then reconnect the drive. If you still don't see it on the desktop it may have been improperly disconnected from the iMac while mounted, look to see if it show's up in Disk Utilities and the System Profiler on the USB bus. If you are plugging it into the keyboard, try one of the USB ports on the back of the iMac or a powered hub. There also could be a conflict with other USB devices, try ejecting and disconnect things like an iPod, a printer/scanner or camera, then restarting the iMac and connect only the Flash drive.
Dennis

Flash Drive Won't Mount Except At Startup

Just bought a little 1Gb USB Flash drive which is USB 1.1 compatible. I want it for transferring files back and forth between my OS 10.4 G5 at home and the old blue and white G3 (OS 9.2.2) I have to use at work.
Trouble is, the G3 won't mount the drive unless it's inserted before startup. Apple System Profiler knows it's there when I put it in one of the USB slots on the back of the computer or in the spare slot on the Macally keyboard, but in neither case does it mount. I've looked at the USB events log in System Profiler and it registers the device being inserted and its call on the USB Mass Storage driver like this:
13436.785: [ 75579098]: Driver - Hub Driver - Device found, calling USBHubAddDevice. Port 3
13437.266: [ 75580125]: Expert - LoadClassDriver: USBCompositeDevice1.5.6 - calling driver initialize routine... 0
13437.267: [ 75580125]: Expert - LoadClassDriver: USBCompositeDevice1.5.6 - driver initialization completed 0
13437.578: [-1744497139]: Expert - LoadInterfaceDriver: USBMassStorageDriver - calling driver initialize routine... 0
13437.580: [-1744497139]: Expert - LoadInterfaceDriver: USBMassStorageDriver - driver initialization completed 0
So there's nothing there that says "fail" there unless that's what the zero at the end of each line means.
If I shut down the computer, insert the drive then start up, it shows up on the desktop no problem. It won't show up again if I trash and remove it though.
However, a graphite G4 in my office, which also runs OS 9.2.2 and seems to have an identical system install, will mount the drive with no problem on any of its USB ports.
Is this a case of the G3's USB ports being underpowered and there's no way round it, or is there a fix out there somewhere?
G3 Blue & White Mac OS 9.2.x

However, a graphite G4 in my office, which also runs OS 9.2.2 and seems to have an identical system install, will mount the drive with no problem on any of its USB ports.
Try this: Copy all of the extensions on the G4 that have USB in their names into the Extensions folder on the G3, replacing the USB extensions that are there; then restart and test again. Some of them may be older or newer versions than the ones on the G3 now, and that can make a difference. Note that in OS 9.x, it isn't always the newer versions of the USB extensions that work better.
Also see this user tip from Apple employee Joerg Weise. In it he lists 6 USB extensions (with version numbers) that can often resolve USB problems in OS 9, even under circumstances different from those described at the beginning of his comments.

In Finder Prefs, does unchecking "Show these items on the Desktop" mean certain connected drives won't "mount" at all -- or they WILL mount but simply not appear as Desktop icons?

In the Finder Preferences panel, when one unchecks a category of "items" (e.g. "Hard Disks," or "CDs, DVDs and iPods," etc.), does that mean that items of that type will not even "mount" as a connected external drive when they get plugged in to the computer? Or, alternately, DO these external devices "mount," and can be accessed via various menu commands or keyboard shortcuts, but it's just that they won't appear on the Desktop as a "Desktop icon"?
The terminology used in the Prefs panels makes me think that they DO mount, they just don't "appear" as icons. Otherwise, the Prefs panel would say "Mount these items as connected drives when plugged in."
Right?
If one unchecks a category, and then connects or inserts a device of that category to the Mac, and then unceremoniously unplugs it from the computer, will one get an error message saying (forget the exact words) "Don't disconnect external drives before first Ejecting them!" Or...not?

If iTunes is already running when I plug in the iPod, then I briefly get the "Connected - Eject before disconnecting" message, but then it goes away after a few seconds, and the iPod screen reverts to the normal home screen, which means I can unplug it without ejecting it.
So the three potential statuses are:
1. Plug in iPod and never launch iTunes = iPod need to be ejected before disconnecting.
2. First plug in iPod and subsequently launch iTunes = get unwanted "connected" message until the moment that iTunes is running, at which point it disappears.
3. First launch iTunes and then plug in iPod = iPod briefly gives "connected" message, but then reverts to home page.
So, it seems that having iTunes open in these settings will (after a brief period at most, or immediately) allow me to unplug the iPod without "Ejecting" it first.
However...I don't want to launch iTunes! The whole point is to just be able to plug in and unplug the iPod without having to fiddle with anything on the Mac. My original problem was that I had to "Eject" the iPod in order to unplug it -- but if the only way to solve that problem is to launch iTunes, then all I've done is replace one problem with another.
I don't want to have to launch iTunes or have it running, now or ever. I just want to recharge my iPod.
So, while we certainly have learned a lot so far (and thanks for your patience!), I don't want to end up with a different problem than the one I started with.
So, the amended question is now:
Is there a way I can simply plug in and unplug my iPod to my Mac for the purposes of recharging only, without having to either "Eject" the iPod from the Mac or having to launch iTunes (manually or automatically)?

Music videos won't airplay from imac to apple tv all other content including movies will???

title say it all, cheers

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CD-DVD Drive won't read CD-ROM just burned -- readable on other computers

Computer: Satellite C655D-S5048
OS: Windows 7 64-bit
Software used for burning: Roxio
Burn process goes smoothly -- options set for creation of read-only disk. Disks are 700 Mb, 52x of good quality.
After having been burned, when reinsterted in the drive, the computer reads the disk as empty, and offers options on how to burn files to it.
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Tried running cleaning disk through -- no improvement.
Thoughts?
Solved!
Go to Solution.

Peter--
Thanks! However, after spending a while on the phone with Toshiba, their tech and I came to the conclusion it might be a hardware problem. I was advised there were two separate lasers/lenses in the drive -- one for reading; one for burning. Given I was able to locate a (brand new) replacement TSST drive online for $29 plus shipping, I opted to order one -- I'll post whether that solved it or not.
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Welcome to Apple Support Discussions,
Very helpful article on this : http://www.iphonefaq.org/archives/97720

Flash Drive Won't Eject as a Whole

My Computer (Windows 8) won't let me eject my flash drive in one piece. It works fine on the other computers (Windows 7 & XP) in my house. When I click "Safely Remove Hardware", three buttons appear:
Cruzer Micro [faded & not clickable]
> - Eject Removable Disk (F:)
> - Eject Removable Disk (G:)
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P.S.
I cant upload images of this without verification.

P.S.
I cant upload images of this without verification.
To expedite this you can add a post to this verification thread.
https://social.msdn.microsoft.com/Forums/en-US/009b33a8-c6af-4525-b27d-cc9ded6c39d4/verify-your-account-27?forum=reportabug
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows]
Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

External Drive Won't Mount

My external backup drive wont mount automatically as it used to with my earlier ibook. I have to re-boot computer to get it to mount. After that it functions properly until the next time I turn it on to do a backup.
I am wondering if there is something in the formatting of this drive which is causing this? I have formatted it a few times since this started to happen but obviously without fixing the problem

Further Details:
1) After normal use of computer connect and turn on external drive. Drive does not mount.
2) Re-boot computer and turn on drive. Drive mounts.
3) Eject drive. Turn off drive. Turn on drive again - drive mounts.
4) Run SuperDuper backup. eject drive. turn off drive. turn on drive - drive mounts.
Thus, it seems (see (1) above), something in the normal use of the computer (not an artifact of the superduper backup process) over a period of time affects the system such that the drive won't mount again.

Verbatim 320GB FireWire/USB Portable Hard Drive Won't Mount

Hello ... I have a Verbatim 320GB FireWire/USB Portable Hard Drive that won't mount. The drive has only been used a handful of times ... it is self powered. I accidentally disconnected the drive without dragging it to the trash first .... so I got the "improper disk removal" error. Now the drive won't mount at all. Is it dead or in some kind of frozen state? Any ideas how I can get it back up and running??
Thanks

Might try Data Rescue II...
http://www.prosofteng.com/products/data_rescue.php
(Has a Free Demo to see if it could or not, but you'll need another drive to recover to).
Or FileSalvage...
http://www.subrosasoft.com/OSXSoftware/index.php?%20mainpage=product_info&productsid=1
to recover what you can.

LaCie external drive won't mount on iMAC

Hi,
My external LaCie external drive won't mount on my iMAC running 10.6.8 but will mount and show up on my PC as working fine, however I am not able to read the information on it as it was formatted for my iMAC. Therefore it leads me to believe this is a software issue.
I have reason to believe someone had changed the permissions and prevented the mounting of this external drive (which belongs to me) so that the contents won't be found on my iMAC.
How to resolve this issue?
Thanks in advance,
Cait

Cait,
Please try a SMC reset, it may take 2-3 attempts for it to work. Look over the instructions below carefully.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

My external drive won't mount. Disk Utility says it can't repair disk and to backup the disk and reformat, but how can I do that if it won't mount?

My external drive won't mount. Disk Utility says it can't repair disk and to backup the disk and reformat, but how can I do that if it won't mount?

See mount section in 1st linked article.
Disk Unmount Using Terminal
Disk Utility – Force Mount Disk

New partition on external hard drive won't mount

I have an 2TB external drive connected by FireWire to my 24-inch, Early 2009 iMac. I created 2 partitions 1 that is about 35 GB and another that is the rest of the 2TB. The 2nd largest partition mounts fine and is being used by Time Machine for my back up. The 2nd one I wanted to use for a Tech Tool Pro eDrive. However the 35 GB drive won't mount. Well it mounts, but after a few seconds it unmounts itself. This is the message I get as it unmounts itself:
8/18/13 7:18:45.788 PM fseventsd[43]: Events arrived for /Volumes/eDrive after an unmount request! Re-initializing.
8/18/13 7:18:45.789 PM fseventsd[43]: creating a dls for /Volumes/eDrive but it already has one...
8/18/13 7:18:46.039 PM fseventsd[43]: disk logger: failed to open output file /Volumes/eDrive/.fseventsd/00000000030d4f84 (No such file or directory). mount point /Volumes/eDrive/.fseventsd
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Any ideas?
I've checked the partition with Disk Utility and no errors.
Regards,
Chris Johnson

If the drive has more than one interface (USB, FireWire, Thunderbolt, eSATA), try one of the other interfaces.
Check that the data cable is securely inserted at both ends.
Try a different cable.
If you're connecting the drive through a hub, connect it directly to a built-in port on the Mac.
If you're connecting it directly, try a different port.
Disconnect all other devices on the bus, or as many as possible.
Test the drive with another Mac. Test another drive with this Mac.
If the drive is bus-powered, but has an AC adapter, connect the adapter.
Boot into Recovery and launch Disk Utility. Does the volume mount?
Start up in Safe Mode and test.
If the drive doesn't work under any of the above conditions, and if another drive does work with the same Mac, then the drive has failed. You may be able to salvage the mechanism by removing it from the enclosure and installing it in another one, or in a drive dock.

Lacie Hard Drives won't mount

My two Lacie hard drives won't mount on my G5 running Tiger. They were fine on my G4 iMac running Panther. I've tried using the Lacie Update Tool but the drives aren't recognised. I've tested the firewire cables on another drive that works and they're fine, so it's not cables.
Both drives power up okay and whir into action, but just aren't talking to the G5.
Lacie d2 HD 80GB FW DV
Lacie 40GB (no model number, "DESIGN BY F.A.PORSCHE", no model number).
Any ideas much appreciated.

Reply
This happened to me with a LaCie external drive as well.
The problem is that LaCie formats the drives as PC-based
and not Mac Extended, so unless you reformatted the
drives to Mac when you started using them, your access
to them on any Mac may result in a failure to mount.
Once that happens retrieval of data is made more difficult
because of this formatting incongruity.
There is no way you can get the data once your G4 quits
mounting them. If you can get the data off of the drives,
back it up and then reformat the drives using Mac's Disc
Utility. Then you can reload the data and I suspect all of
your Macs will then mount the drives via Firewire.
Good Luck!
My two Lacie hard drives won't mount on my G5 running
Tiger. They were fine on my G4 iMac running Panther.
I've tried using the Lacie Update Tool but the drives
aren't recognized. I've tested the firewire cables on
another drive that works and they're fine, so it's
not cables.
iBook G4 Mac OS X (10.4.4)

Flash drive won't mount on iMac but mounts on all other computers

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