Although its likely, that some file extensions may be missing from the list of associated file extensions with the application, yet they can be opened, be part of, or otherwise be associated with the program. However most, if not all directly associated file extensions should be listed with its appropriate program. (Users with earlier Mac OS versions need to upgrade to Mac OS 8.6 or later.) Sibelius 2's cool new look and feel complements Mac OS X's stunning Aqua interface - the redesigned toolbar, navigator and keypad all make working with Sibelius 2 faster and easier than ever before. Sibelius 2 is the first major music application to be 'carbonized' for Mac OS X, and also fully supports Mac OS 8.6 and 9.x. The list of extensions used or otherwise associated with the application may not be complete, because many common file extensions on our website, such as jpg (pictures) or txt (text files), can be opened by a large number of applications, or are too general file format. All the improvements and many more are incorporated in the more recent upgrade to Sibelius 6. Note: You can click on any file extension link from the list below, to view its detailed information. Sibelius for Mac works with the following file extensions: