In Mac OSX, Unix and Linux everything is a file, so you can use this command to monitor opened processes, files, devices…etc. Create a disk image Convert a disk image to another format Resize a disk image Restore a disk image to a disk Set up and manage RAID disk sets. You may see Fseventsd process and it’s process id in the list, use “sudo kill -9” to kill this process.Īdditional Information: List Open Files (lsof) is a useful tool that will show you opened files. If unable to unmount drive on Mac You can try booting from OS X recovery by holding CMD + R at the time of startup. “lsof | grep” then drag the drive to the terminal window to complete the path to the drive’s mount point, and press enter. On newer Macs with the recovery partition, you can enter macOS Recovery, then. To terminate the Fseventsd process, login to Terminal and type in: The solution is to boot from a different volume from the one you intend to format. Events are logged in the hidden “.fseventsd” directory at the root of the drive. It is to log the changes in the file system. You may want to login to Terminal mode and check if there is any process locks down the drive for example: fseventsd process.įseventsd is a file system “events” notifier, running as a daemon process, used by Spotlight, Time Machine and other 3rd party softwares. There is a chance that some background process may lock the drive and prevent it from being formatted, please turn off Spot Light and Time Machine.įor more information about Spot Light and Time Machine, please visit:ģ.
If the umount command returns the error, Cannot unmount /dev/logicalVolumeName: The. If Disk Utility can’t repair your disk, or you receive a report that the First Aid process failed, try to repair the disk or partition again.
Mac os disk utility cannot unmount disk mac os#
If your drive has been used under Windows, it might be in Windows NTFS / FAT format, you will need to change the partition format to GUID partition or Apple Partition Map in order to format and mount the drive in disk utility.įor more information about partition in Mac OS disk utility, please check: How do I partition my drive in Mac OS X®?Ģ. If your drive has been used under Windows, it might be in Windows NTFS / FAT format, you will need to change the partition format to GUID partition or Apple. Solution 1: Reboot your Mac and run Disk Utility First Aid. Please do the trouble shooting as following:ġ.
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