Mac OS X quick-fire questions
How can I check the permissions of a Property List?
> Select the file in Finder, then choose File > Get Info. At the foot of the window that opens you’ll see Sharing
& Permissions, which lists access rights only for what you selected. Click the padlock at the bottom-right corner of the window, provide your password, then edit the permissions.
How can I change the app that’s used to open a file type?
> Select a file of the type you want to open with a different app, on this occasion and in future, then choose File > Get Info. In the ‘Open with’ section of the window that appears, select the app you want to use (choose Other and browse to the app, if necessary) then click the Change All button.