How do you enter action replay codes on desmume 0.9.7 for Mac OSX lion?

Enter the game you have the code for, then in the upper-left hand corner you should see "Emulation" click on it and a drop down menu will appear and one of the options on it is "Cheats." Mouse over this option then you will see "List." Click on this button and then select the "Action Replay" button at the bottom, then enter your code in the code box and you may add a description (it is not necessary though.) Make sure the box that says "Turn on code" is checked and then press "Add" at the bottom. If this code requires to hit a button combination after entering the code, do so. If it does not work, save and restart the emulation. If it still does not work, some forms of Pokemon games are non-supported on DeSmuMe, or the code is broken. Hope this helped!