Originally released as a free download for Mac OS X v10 .2 on September 10 2002 , with the release of Mac OS X v10 .3 it was bundled with the operating system as iCal 1.5 . Originally released as a free download for Mac OS X v10 .2 on September 10 , 2002 , with the release of Mac OS X v10 .3 it was bundled with the operating system as iCal 1.5 .