macOS Associating file extension to saved files in my plist.

[rafer11]

What property do I want to change to have the files saved by my application have a specific file extension? All the search words I'm using to search google are much to common like 'associate file extension type in xcode plist"

 

[balamw]

Does this help: http://developer.apple.com/library/...and_utis_declare/understand_utis_declare.html

B