Utility that unmounts disks easy
What is Unmount Disk?
Every time you physically eject USB Flash drives, Thunderbolt Hard Drives, mobile devices connected as flash drive, without unmounting in OS X, your operation system gets error named "Couldn't unmount disk". Sometimes even Apple Disk Utility couldn't fix this error, and you have to reboot your OS.
Unmount Disk is a small utility that help you unmount and eject your Flash and Hard drives in two clicks. Use it every time before physically ejecting your drives and you never will see "Couldn't unmount disk" error.