My external hard drive is not recognized on my new MacBook Pro, even though it is recognized on my older MacBook and other computers. Help?

Please help me find a solution to my new MacBook Pro not recognizing my hard drives. Yes, thats two hard drives I have that don't seem to work on this computer but both work on my older MacBook and many other computers.

It is formatted for both PC and Mac
I have tried finding it in Disk Utility, no dice...
Tried both USB Ports
And a reboot is still unsuccessful..

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I recently updated my Mid 2007 iMac with the latest OS 10.8.5 now my external hard drives will not show up. They show up when I boot them up on a machine running and earlier OS. Is there a fix for this?

I recently updated my 20-inch, Mid 2007 iMac with the latest OS 10.8.5 now my external hard drives will not show up. They show up when I boot them up on a machine running and earlier OS. Is there a fix for this?

Can you see them in Disk Utility?
If so, can you select and Mount them?
If not, disconnect them, reset the iMac's SMC and then reconnect them.
Intel-based Macs: Resetting the System Management Controller (SMC)
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Wait fifteen seconds.
4. Attach the computer's power cord.
5. Wait five seconds, then press the power button to turn on the computer.
If you still can not see them, connect them back up to the iMac running the older OS, open Disk Utility and look to see how they are partitioned and formatted.

My external hard drive is not recognised on my mac book pro

my external hard drive is not recognised on my mac book pro

Hello all -
similar situation. Unplugged external hard drive and all to take the laptop on a trip. On return, I plugged everything back in and keep getting this message:
Time Machine couldn’t complete the backup to “Iomega_Ext_Drive”.
Files can’t be copied onto the backup disk because it appears to be read-only.
You may need to repair or reformat the disk using Disk Utility. If the disk can’t be repaired, you must use a different disk for backups. Open Time Machine preferences to select a different backup disk.
open time machine preferences. -
I tried this and tried "repair" but that didn't work and I still get this message. Any advice? thanks

What should I format my wd external hard drive to to use with my new Mac Pro?

What format should my wd external hard drive be in order to use with my new Mac Pro?

If you're going to use it only with Macs, use Mac OS Extended (Journaled). It's the fastest filesystem to use on Macs.
If you're going to use it with PCs and Macs, use exFAT or FAT. I recommend exFAT because it hasn't got limitations as FAT and it's faster, but you need Windows XP Service Pack 3 or later to use it on PCs

My external hard drive is not recognized by my computer.

My external hard drive is not recognized by my computer. I used it earlier and it was fine however my computer froze and I unplugged my hard drive without properly ejecting it. Now when I plug it in nothing pops up. I've tried on three different computers and no luck. I hope this is fixable! Please help.

Care to share which OS you are using?
Repair permissions & restart your computer.
Zap the PRAM

My toshiba external hard drive is not being recognized, except when I eject it. I have the preferences checked to show icon and have checked utilities folder. nothing. Help!

I have a iMac, Yosemite 10.10 and my toshiba external hard drive is not being recognized, except when I eject it!. I have the preferences checked to show icons and have looked in the utilities folder..nothing. I have also changed ports. ??

A few things to try:
1-Repair permissions and restart your computer.
2-Zap the PRAM
3-Use Software Update/App Store to update your OS to OS 10.10.3. Also, update everything SU/AS has to offer for your computer. When done, repair permissions and restart your computer.

External hard drive is not recognized in Migration Assistantt

I had my hard drive replaced on my iMac, Mac OS 10.4.11, Snow Leopard.
I backup my computer using Time Machine onto an external hard drive.
In Migration Assistant, the external hard drive does not show up. There are no choices to choose to migrate from.
Any suggestions please!

See Pondini's TM FAQs, for starters.

After upgrading to osx 10.9.3, my external hard drive was not able to mount, but it can be mounted without issue in osx 10.6, how do I solve it? it was formatted by disk utility.

Hi
After upgrading to osx 10.9.3, my external hard drive was not able to mount, but it can be mounted without issue in osx 10.6, how do I solve it? it was formatted by disk utility.
Thanks
PT

From the menu bar, select
 ▹ System Preferences ▹ Energy Saver ▹ Power Adapter
and uncheck the box labeled Put the hard disk(s) to sleep when possible, if it's checked.
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.
Start up in Recovery mode and launch Disk Utility. Is the drive recognized?
Start up in Safe Mode and test.
Reset the NVRAM.
Reset the System Management Controller.
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.

External Hard Drive does not mount

My 2TB external hard drive does not mount and I cannot get it to. Have tried turning the hard drive off and then back on. No response. Any thoughts as to how I can get it to be recognized?

You can try doing a SMC reset, if it doesn't work the first time it's totally OK to reset the SMC several times.
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 hard drive is not working on my mac.

I have tried all options available such as going on finder and making my hard drives visible and disk utilities

Basically my external hard drive would not eject so i force quit it and the hard drive does not come up at all anywhere on my mac pro OS X version 10.9.4 and it isn't visible in disk utilities no and it doesn't say format either and i have tried it on a windows computer it does not show on their either. the format is Fatdos i think so i can use it on windows and mac and i cant see anything in system reports and yes it is connect by a USB. also it isn't making any noises either

External Hard Drive does not show up in Finder

My external hard drive is not showing up in Finder.
It shows up in Disc Utility, but I do not have access to it. I have tried the following:
command-shift c, nothing happens
confirmed in Preferences/General that external hard drive was checked
tried another cable
tried another port on the back of the external drive
tried to connect through the USB port
re-started, etc.

zone-5 wrote:
I have same problem after installing OS 10.5.8. Disk utility sees the hard drive, the computer does not. Disk utility says invalid node structure. Volume check failed. Filesystem verify or repair failed.
That means the directory is corrupt. If you have a heavy-duty 3rd-party disk repair app, such as +Disk Warrior,+ it may be able to fix it. Otherwise, your only option is to erase and reformat the disk. They're not cheap -- Disk Warrior is about $100. And for Leopard, you need version 4.1.1 or 4.2.
I have not been able to figure out how to start a new topic here, but did find this discussion, which fits me fairly close.
Just above the list of topics, on the left, is a +Post New Topic+ option.

External Hard Drive is Not Showing Up on Desk top?

My external hard drive is not showing up on my desk top any more. When I tried to reconnect it I get the follow message.
You have inserted a disk containing no volumes that Mac OS X can read. To use the unreadable volumes, click Initialize.
Help what should I do? I have 50 GB of music on it and it's never had this problem before.
Thanks
Jeremy

Norton has a bad reputation because they have not kept up with changes in the Mac file structure. Norton version 8 is the one you should be using, if you choose to use it. Earlier versions will likely damage your directory, possibly beyond repair by other utilities.
Any time you use any Disk Repair Utility, it is somewhat of a crap shoot. It may or may not be able to make the repair, and you may or may not lose a few to very many files in the process. The program best respected in this arena is Disk Warrior. If you choose to buy it, pay very close attention to which version you are buying, as the latest version CD (intended to boot 10.3 or 10.4) may not boot on your Mac.

External hard drive is not working on airport time capsule even after 7.7.2 firmware update.

External hard drive is not working on airport time capsule even after 7.7.2 firmware update.
I have the latest Airpor Time capsule 2gb. I specifically bought it so that I could have an external hardrive set up to wirelessly house my itunes library and movies. When i connect the drive, all i get is that the disk needs to be repaired.
the drive can works fine when connected to the macbook pro and I have run the verify and repair features in disk utility. I have also reset the airport timecapsule as well following these changes and still no change.
The 7.7.2 update says that it addressed the usb issue of not showing the drives but there are still problems as I cannot get it to appear.
Please help.
Thanks

How is the hard drive formatted?
Have you tried using a powered USB hub with the drive when it is connected to the Time Capsule?
(The USB port on the Time Capsule is borderline as far as power is concerned....you may need to use a powered hub.....even if the hard drive has its own power supply)
If the drive is formatted correctly....and....it has ample power, it will "show up" when you open AirPort Utility, click Edit, then click the Disks tab at the top of the next window.
In the example below, my Time Capsule drive is named "Backups" and another drive named "WD Drive" is connected to the USB port on the Time Capsule.
You should see the name of your Time Capsule drive (named "Data" unless you have changed the name) and the name of the USB drive if you perform the same check.
What do you see?

External hard drive does not show up

External hard drive does not show up in imovie.

Hi,
Welcome to the Discussions.
The drive's directory is damaged and as you found Disk Utility isn't equipped to repair it. You need Disk Warrior or Tech Tool Pro.
John

I got a new computer and backed up my iTunes library to an external hard drive. The external hard drive is not allowing me to access the drive. Is there a way to transfer the songs from my iPod touch to my new computer?

I got a new computer and backed up my iTunes library to an external hard drive. The external hard drive is not allowing me to access the drive. I no longer have access to the old computer. Is there a way to transfer the songs from my iPod touch to my new computer?

That's a bummer, didn't realize the exHD files were corrupt, esp if you have tried from another PC and not just this new computer.
You can get purchases from the itunes store transferred from an iPod using these directions:
http://support.apple.com/kb/HT1848?viewlocale=en_US
If you want everything (meaning non-itunes songs, app data, photos, etc) you need to buy a 3rd-party ipod manager that support iTouch. Here is an iLounge article to start your research:
http://www.ilounge.com/index.php/articles/comments/copying-music-from-ipod-to-co mputer/P2/

My external hard drive is not recognized on my new MacBook Pro, even though it is recognized on my older MacBook and other computers. Help?

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