Track Timer System Requirements

For OS X (Version 10.1 and higher):

Script Timer 2.1 or later (2.3.1 and later required OS X 10.2 or later)

• any OS X version of iTunes.

For OS 9.2:

• Script Timer 1.2

• version 2.0.4 of iTunes.

(NOTE: The dynamic scheduling feature is not available in OS 9.)
 
Track Timer is not available for earlier versions of the Macintosh operating system because iTunes is not available.