02-15-2017, 02:13 AM
Quite often the reason why you can't unmount a drive is because as soon as it's mounted, Spotlight grabs it and starts indexing and won't let go.
Sometimes repeated unmount attempts will eventually work if you catch it just right, sometime putting the computer to sleep and then waking it and quickly clicking the unmount button before Spotlight resumes will work.
In the old days, booting from the install DVD and running Disk Utility from there was the best way to manipulate drives because Spotlight wouldn't run at all.
Sometimes repeated unmount attempts will eventually work if you catch it just right, sometime putting the computer to sleep and then waking it and quickly clicking the unmount button before Spotlight resumes will work.
In the old days, booting from the install DVD and running Disk Utility from there was the best way to manipulate drives because Spotlight wouldn't run at all.