From terminal run df and give a look to the value for the Filesystem column of output - the name of the mounted volume is on column Mounted On.
Say that Filesystem column value for the volume you desire to unmount is /dev/disk2s2; from the command line run: hdiutil eject -force /dev/disk2s2 and that’s all.
sdoubleya reblogged this from kusor and added:
If only I could unmount...Sxityforce dmg that’s been mounted
kusor posted this
