- Format Wd Passport For Mac Couldn't Unmount Disk Drive
- Formatting Wd Passport For Mac Couldn't Unmount Disk
Technicalconfessions.com This video show an alternative way to reformat and erase your SD drive when you receive the following error within the disk utility. Feb 08, 2020 How to Format an External Drive for Mac (from NTFS to Mac OS Extended) Note: The tutorial and screenshots below are based on macOS Sierra 10.12.5. They might be different if your Mac has a different version. Step 1: Open Disk Utility. Many symptoms may show that your Mac’s hard disk is on the verge of crashing. You should know that the disc is going to unmount if you see the following signs: A drive doesn’t mount through one of the following ways - USB or firewire You can see the files, but cannot carry out any functions such as moving or copying. If the OS X is denying you to format, erase and repair the Mac hard drive or a volume due to the Couldn’t Unmount Disk’ Error then use Stellar Partition Manager to format the hard drive with Mac OS X Extended Journaled file system. Formatting the hard drive or partition scheme will recreate a new HFS file structure on the hard drive, which will be free from cryptic errors.
A friend of mine recommended WD drive My Passport (4TB) for me because I need one. The current one (SeaGate) is not stable, sometime it is not recognizable. I suspect it is due to the cable. Anyway I need more space for my massive data so I grabbed WD My Passport Ultra Metal Edition.
NTFS vs. Mac OS Extended (Journaled)
I use Windows at work, MacOS and sometimes Linux (CentOS) at home. Everything went smooth, I copied to backup 50+ GB of data in about 20 minutes.
The problem happened couple of minutes ago. I couldn’t copy files from my Mac to WD drive. I immediately recognize that is because the WD drive is formatted as NTFS by default. I reviewed the manual and it recommended user (me) to reformat WD drive before using on Mac. It did the same following this tutorial with no doubt and got this error. I tried couple of times and also tried it on another Mac machine and they led to same destination.
In my opinion, WD should update their how-to document or at least remove this one.
Format Wd Passport For Mac Couldn't Unmount Disk Drive
Get WD Drive My Passport back to work
I gave Support a call and it was out of their working hours unfortunately. At the time I am writing this article, I think I can call them at other zone which is in working hours. Anyway, I searched for solutions and here’s what I tried.
Formatting Wd Passport For Mac Couldn't Unmount Disk
# First run
diskutil list
diskutil list
# To get the name to the disk you’re trying to format. The below commands assume this is “disk1”, but replace “disk1” with the correct disk if it’s something different.
# Now unmount the disk:
diskutil unmountDisk force disk1
# Now unmount the disk:
diskutil unmountDisk force disk1
# and then write zeros to the boot sector:
sudo dd if=/dev/zero of=/dev/disk1 bs=1024 count=1024
sudo dd if=/dev/zero of=/dev/disk1 bs=1024 count=1024
# Finally attempt to partition it again:
diskutil partitionDisk disk1 GPT JHFS+ “My External HD” 0g
diskutil partitionDisk disk1 GPT JHFS+ “My External HD” 0g
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Credit: https://www.reddit.com/…/disk_utility_fails_to_eraseformat_an_external_hdd/