MacOS Disk Utility

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MacOS DIsk Utility DiskUtility

Enable MacOS Disk Utility Debug Menu and Advanced Image Options

This only works for MacOS Yosemite (10.10) or earlier. Later versions of MacOS have removed this feature. For El Capitan (10.11) and later you can still list all partitions, including hidden ones, by opening a command-line shell and running the command diskutil list.

  1. . Quit Disk Utility if it is running.
  2. . In a shell run the commands:
defaults write DUDebugMenuEnabled 1​
defaults write advanced-image-options -bool true
  1. . Open DIsk Utility and you should now see a Debug menu next to the Help menu. The Images | Checksum menu will offer more hash options.

Under Debug you will find List All Disks and List All Disks with properties.

Some of the commands under Debug send their output to the MacOS Console. Open the Console utility to see this output under SYSTEM LOG QUERIES | All Messages. You may also view the output in /var/log/system.log or with the syslog -w command.