Jun 22, 2017 Similar problem. Bought WD 6T external My Book to use with Time Machine. Tried to format in Disk Utility by erasing - Mac OS Extended (Journaled) & GUID Partition Map. I get the message “Erase process has failed”. Details say Unmounting disk, couldn’t unmount disk, operation failed. What did I do wrong? Any help is greatly appreciated. Color atlas of hematology glassy pdf reader. Mac OSX 10.9.x, and 10.10.x include a built in utility known as Disk Utility that can be used to partition and format a hard drive. To partition and format the drive with Disk Utility, follow these steps: 1. Double left-click on the Mac HD, the internal Mac hard drive visible on the top-right corner of the desktop screen. It's proper for the operating system to not unmount a volume if there is, on the volume, an open file that can not be closed. Recommended reading. The accepted answer to The volume can't be ejected because it's currently in use. Note the comment about use of sudo; The Mac App Store page for WhatsOpen.
- Format Wd Passport For Mac Couldn't Unmount Disk Storage
- Format Wd Passport For Mac Couldn't Unmount Disk Drive
- Format Wd Passport For Mac Couldn't Unmount Disk Storage
Format Wd Passport For Mac Couldn't Unmount Disk Storage
2T My Book Essential used for Time Machine (OS 10.9.4 Mavericks) has become corrupted. Does not show in Finder but does show as mounted in Disk Utility, although the partition does not mount. Am trying to reformat to make disk useable again (don’t care about the data), but both Disk Utility and WD Quick Formatter won’t format it due to “cannot unmount” error. Also, in Activity Monitor, I see high % of CPU activity for the fsck_hfs process, which immediately goes away when drive is disconnected.
Have tried the following without success: 1) tried connecting to another Mac (also running Mavericks), 2) rebooted in Recovery Mode (same error), 3) turned off Time Machine, Spotlight and all other open programs.
![Format Wd Passport For Mac Couldnt Unmount Disk Format Wd Passport For Mac Couldnt Unmount Disk](https://i.ytimg.com/vi/1ySdC-S6um8/maxresdefault.jpg)
Suspect that the fsck_hfs activity is keeping the drive mounted, but how do I shut that off? Don’t have a Windows machine (perish the thought) for reformatting. Am trying to keep this thing from becoming a $150 brick.
Format Wd Passport For Mac Couldn't Unmount Disk Drive
![Disk Disk](https://aws1.discourse-cdn.com/wd/optimized/3X/e/f/efdea5619c11a2e8912ff5302eb4db26bfe9a650_2_1024x565.png)
Format Wd Passport For Mac Couldn't Unmount Disk Storage
Any proposed solutions?