You’re in a rush to eject an external disk, but the Finder tells you it’s in use by unnamed apps. What should you do next, and what has Sloth to do with it?
eject
When you try ejecting a single volume of a bootable volume group on an external disk, other volumes are also ejected even though you chose to keep them mounted.
Finder refuses to eject a volume because it’s in use, or Disk Utility complains that it can’t unmount a volume. Here’s what to do about it.
Why do I keep getting alerts that my three external drives are not ejected properly?
Whenever I try to eject removable storage media, I am warned that an application might still be using them. Why?
My two USB drives have started to eject themselves, suddenly and without any warning. Why?
The Eclectic Light Company 