A notification that the workspace posts when the Finder is about to unmount a device.
- macOS 10.0+
This notification will not be delivered if a volume was forcibly and immediately made unavailable, such as when a FireWire drive is simply unplugged.
The notification object is the shared
NSWorkspace instance. The
user dictionary contains a key
@"NSDevice that returns the path where the device was mounted, as a string.