HOWTO: Install Mac OS X Bash Update 1.0

Platform: Mac OS X
OS Version: 10.7.5, 10.8.5, 10.9.5


This update fixes a security flaw in the bash UNIX shell. Read more about Bash "Shellshock" Bug:


First make sure your Macintosh Computer is fully up-to-date before installing this patch.

  1. Go to the Apple Menu located in the upper left corner and select Software Update
  2. Follow the instructions to update your Mac

If your Mac is enrolled in PEAS: *

NOTE: If the Bash Icon does not show up in Self Service your computer has already been patched.

  1. Launch Self Service from the Applications folder ( Go menu > Applications)

    Self Service

  2. Click the icon labeled Bash Vulnerability Patch

  3. Click Install to confirm

If your Mac is not enrolled in PEAS:

NOTE: If you would like to enroll in PEAS follow these instructions.

Download and install the correct patch for your computer based on which OS X you are running.  

If you don't know which version, go to the Apple Menu located in the upper left corner and select About this Mac
A window will open showing which version is installed.

How do you know if you are enrolled in PEAS?

Confirm you are enrolled in PEAS by opening your Applications folder and browsing for the Self Service application. If you have Self Service, you're enrolled! If you are not enrolled in PEAS, visit our Self-Enroll page for instructions:

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