Mac OS X: mount or unmount .dmg image from command line

• To mount a .dmg image in command line, run the following command in Terminal:

  hdiutil mount ~/Downloads/jdk-7u4-macosx-x64.dmg
  

  You will see something like below:

  $ hdiutil mount ~/Downloads/jdk-7u4-macosx-x64.dmg 
  expected   CRC32 $75F74818
  /dev/disk3           GUID_partition_scheme           
  /dev/disk3s1         Apple_HFS                       /Volumes/Oracle JDK 1.7.0_04
  

  It is mounted to "/Volumes/Oracle JDK 1.7.0_04"
• To unmount it, run the following command in Terminal:

  hdiutil unmount "/Volumes/Oracle JDK 1.7.0_04"