You do not need this patch if you purchased the game the App Store. Games purchased on that site are automatically updated.

SYMPTOMS: This is a Universal Binary Update for Star Wars: Knights of the Old Republic. This update also adds support for bloom filtering and soft shadow effects on Macs that support these features. This update will bring your version of KOTOR to 1.03E. This is an Universal Binary patch that is intended to help Knights of the Old Republic play on Intel Processors.  It is a replacement app icon that must be moved to the Knights of the Old Republic folder that you already have installed in Applications. 

Download it here

Star Wars Knights of the Old Republic Patch v1.03e (Universal)