How do I edit a .plist file? What's the best application to open and edit a plist file ?
If the plist file is in the XML format, you can edit it in any text editor like TextEdit. If the plist file is in the binary format, you can convert it to XML first by running:

plutil -convert xml1 file.plist


If you want to go back to binary format after editing:

plutil -convert binary1 file.plist


If you have Xcode 4.3 or later, you can use it to edit property lists in a graphical editor like this:



Xcode 4.2 and earlier came with a separate application for editing property lists (/Developer/Applications/Utilities/Property List Editor.app/).