How to disassociate a file type with an application in Mac OS

Solution 1:

This is what I did in Parallels Desktop 5.

  1. Open Application: Parallels Desktop
  2. Click Menu: Window/Virtual Machine List
  3. Right Click: Virtual Machine
  4. Select Pop-up Item: Configure
  5. Select Tab: Options
  6. Pick from List: Shared Applications
  7. Uncheck: Share Windows Applications with Mac OS X
  8. Optionally uncheck: Share Mac OS X applications with Windows.

I tested it with this command in Terminal:

open -a Firefox http://www.apple.com

Solution 2:

Right-click the file, select Get Info. In the Open with section, change the default application, and optionally click Change All. More info at this tech-recipes article.

Example