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How to disable the Guest account in Mac OS X

by Oscar Sodani
June 28, 2006
If your Mac has file sharing turned on, then any user can connect to it via the Guest account. This tutorial will show you how to disable the Guest account.
  • Download and install the trial version of PList Edit Pro
  • On your Mac, go to /Library/Preferences and copy the file called com.apple.AppleFileServer.plist to your Desktop
  • Double-click on the new copy of com.apple.AppleFileServer.plist on your Desktop
  • Expand Root (under the Property List column) and find the option for guestAccess
  • Change the value of guestAccess to no
  • Save the file and exit out of PList Edit Pro
  • Copy com.apple.AppleFileServer.plist back into your /Library/Preferences folder
  • Restart your computer
Source: Mac Tips & More blog