AppleScript actions are platform-independent and do not need any changes to run on Intel-based Macintosh computers. However, any action that contains Cocoa code, whether it is a solely Cocoa action or an action that uses both AppleScript and Cocoa code, must be built as a universal binary to run correctly on both architectures.
For more information, see Automator Programming Guide.
Last updated: 2007-02-26