1) Open finder.
2) Go to the ~ place, where "~" is your user name.
3) Open Libraries.
4) Open Application Support.
5) Open Knights of the Old Republic.
6) Open swkotor.ini.
7) ******IMPORTANT****** Save a backup of the file, in case you mess up!
8) Scroll down to "GAME OPTIONS"
9) Add the following two lines of text to game options, exactly how you see them...
b) Enable Console=1
10) Save, and exit.
11) Find a list of cheats online.
12) Use the "~" button on your keyboard to open the console in-game.
13) Enter whatever cheat you want...