While the launch services in OS X use file name extensions to associate files with various applications, generally users do not need to interact with these extensions and the system keeps them hidden ...

A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the ...

Apple has released several new and revised Developer Release Notes. We post two examples below. Because of our recent coverage of the file name extensions vs. Type/Creator controversy, we offer an ...