Shut down your Mac, then unplug all nonessential devices from your Mac. If you're repairing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good. Then turn the drive off and back on. If your disk still doesn't appear in Disk Utility, your Mac might need service. I can't mount an external hard drive. I have tried booting into Safe-Mode, mounting via Disk Utility and running First Aid, which won't proceed due to the following error: diskutil eject disk1 Volume timed out while waiting to eject. I have also gone through the steps oulined here and here, as well as using Clean My Mac. Any suggestions?
Usb Hard Drive Won't Mount
- If you use external USB or FireWire hard drives on your Mac, one problem you may encounter is where the drive will not mount in OS X when attached to your computer. Topher Kessler April 21, 2010 3.
- If your Mac is not recognizing a USB or external hard drive after this, you'll have to try mounting it manually. Mount an external hard drive on Mac. If Mac isn't automatically recognizing your external hard drive, it's time to force it to. Connect your hard drive and follow these instructions: Go to System Preferences Disk Utility.
'Hard drive of my Mac computer is not mounting properly and hence I cannot view any files present in it. I can clearly see the drive in ‘Disk utility' but it doesn't shows up on Mac Finder. It would be grateful if I get any useful suggestions related to this problem. Thanks'
Mac is the excellent operating system which provides many features to save manage and organize your files. But occasionally Volume created on your Mac might fail to mount. Generally when you open Mac Finder to access the information from Mac volume, Mac finds for the file system which has been assigned to the specific drive; and if it fails to find file system, then it could not access volume and you will find Mac hard drive in unmountable state. However, Mac is equipped with 'Disk Utility' feature that will allow you to fix issues related to Mac hard disk. But to run 'Disk Utility' you should have OS X installation disk that comes up with Mac computer.
Follow below given procedure to make the hard drive mountable on your Mac computer:
- First of all insert operating system installation disk into the disk tray and click on 'Apple' icon on your computer's menu bar. Select 'Restart' option in order to reboot Mac computer
- Hit and hold 'C' key when your Mac computer is rebooting to start the computer from installation disk
- Choose 'English' option from the language menu when asked and then press on 'Disk utility' option from menu to run it
- Press upon 'First Aid' tab and click on your Mac computer's volume under the hard drive icon
- Click on 'Repair' option and Disk utility will check and fix your Mac computer's hard drive
When Disk Utility has finished repairing the hard drive of your Mac computer, it will restart normally and you will find hard drive of your Mac computer in mountable state. However when you try to access information from it, you will be asked to format the drive. If you proceed to format, then complete data saved on Mac hard drive will be erased. In case you do not format hard drive, then Mac keeps on asking you to format hard drive each and every time you click on Mac hdd and you won't be able to use any data saved on unmountable Mac hard drive.
Then what is the resolution to overcome data loss?
Well, one of the best ways to get back lost data from hard drive that won't mount on Mac is utilizing Time machine backup. If you do not have the habit of running Time machine on time, then relying on data recovery software is the last and best option left for recovering data from Mac hard drive. Yodot Mac Data Recovery is the well known software that can be used to get back missing files and folders from unmountable Mac hard disk drive. You can restore data after Mac partition failed with the error could not unmount disk. It will display hard drive type, file system and its memory which will give clear picture about the Mac hard drive which has become unmountable due to virus attacks, software malfunction, power failure and so on. Using this reliable software, one can retrieve Microsoft Office files, compressed files, application, media files, animations, adobe files and other files with different file extensions. Upon recovering desired files, it will show you the preview of images and other media files that you choose and facilitate to check them for quality and successful data recovery.
Procedure to get back files from hard drive which does not mount on Mac:
Note: Safely remove and connect Mac hard drive that is not mounting to healthy Macintosh computer as external hard drive after installing this tool.
Hard Drive Not Mounting Mac
- At first download Yodot Mac Data Recovery software and install it to your Mac computer
- Upon installing, run it to begin the recovery of files from Mac hard drive that wont mount
- Main screen shows up two options which are 'Volume Recovery' and 'Formatted / Reformatted Recovery'
- Choose first option to regain files from unmountable Mac hard drive
- Let it scan by clicking on 'Next' and select recoverable file types from file list which software displays
- Confirm about file selection using two view types which are 'Data View' and 'File Type View'
- Preview retrieved files and at last choose desired destination to save them on your Mac hard drive or to any external storage drive
Safety Measures:
- Do not shutdown your Mac computer forcefully when any process is going on
- Always run Time machine to take backup of your data
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> How do I tell if my external drive uses NTFS?
1. Open Terminal app ( in Applications > Utilities )
When Disk Utility has finished repairing the hard drive of your Mac computer, it will restart normally and you will find hard drive of your Mac computer in mountable state. However when you try to access information from it, you will be asked to format the drive. If you proceed to format, then complete data saved on Mac hard drive will be erased. In case you do not format hard drive, then Mac keeps on asking you to format hard drive each and every time you click on Mac hdd and you won't be able to use any data saved on unmountable Mac hard drive.
Then what is the resolution to overcome data loss?
Well, one of the best ways to get back lost data from hard drive that won't mount on Mac is utilizing Time machine backup. If you do not have the habit of running Time machine on time, then relying on data recovery software is the last and best option left for recovering data from Mac hard drive. Yodot Mac Data Recovery is the well known software that can be used to get back missing files and folders from unmountable Mac hard disk drive. You can restore data after Mac partition failed with the error could not unmount disk. It will display hard drive type, file system and its memory which will give clear picture about the Mac hard drive which has become unmountable due to virus attacks, software malfunction, power failure and so on. Using this reliable software, one can retrieve Microsoft Office files, compressed files, application, media files, animations, adobe files and other files with different file extensions. Upon recovering desired files, it will show you the preview of images and other media files that you choose and facilitate to check them for quality and successful data recovery.
Procedure to get back files from hard drive which does not mount on Mac:
Note: Safely remove and connect Mac hard drive that is not mounting to healthy Macintosh computer as external hard drive after installing this tool.
Hard Drive Not Mounting Mac
- At first download Yodot Mac Data Recovery software and install it to your Mac computer
- Upon installing, run it to begin the recovery of files from Mac hard drive that wont mount
- Main screen shows up two options which are 'Volume Recovery' and 'Formatted / Reformatted Recovery'
- Choose first option to regain files from unmountable Mac hard drive
- Let it scan by clicking on 'Next' and select recoverable file types from file list which software displays
- Confirm about file selection using two view types which are 'Data View' and 'File Type View'
- Preview retrieved files and at last choose desired destination to save them on your Mac hard drive or to any external storage drive
Safety Measures:
- Do not shutdown your Mac computer forcefully when any process is going on
- Always run Time machine to take backup of your data
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Click here to know a better way for recovering data from LaCie Rugged Triple 500GB USB 3.0 external hard drive.
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> How do I tell if my external drive uses NTFS?
1. Open Terminal app ( in Applications > Utilities )
2. Type in diskutil list and Enter.
3. You will see lines of output something like below. ( This is for my Mac Mini with Internal drive only )
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
Hard Drive Will Not Mount
2: Apple_HFS Macintosh HD 999.3 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
You will get second set of similar following them for (most likely) /dev/disk1, if your mac has an external drive connected.
In the case above, there are three partition. - EFI (for mac boot), Macintosh HD (OS X), and Recovery HD ( for booting in recovery mode ).
The TYPE column tells what is the format of the partition.
- 'Apple_HFS' is for normal boot/data partition for OS X.
- 'Microsoft Basic Data' is NTFS, for Windows data or boot , including BootCamp.
Other possible TYPE can be listed with another Terminal command diskutil listFilesystems.
> I couldn't even read from the drive when I plugged it in.
I can only guess, as I have no detail info about what happened on your Mac at this point.
Probably, the Seagate driver took over OS for NTFS handling, but it fails to process due to necessary software ( part of driver ) did not work properly due to the compatibility with Yosemite.
It may help to identify the problem if you can find error messages in system log, which can be viewed with Console app ( also in Utilities folder ).
The message may come out either at OS boot or on connecting the drive.
Also, visit Seagate site and check if any firmware update is available for your drive ( req. serial number ).
