DISKROD Audacity does work with a Mac-Intel but it requires another freeware program called LineIn 2.0.2. Connect your headphone microphone headset on your Mac-Intel. Install LineIn and open it. Select Built-in Audio: Line In on the first button. On the second button, select Built-in Audio Line Out. Press the PASS THRU button 3 times. Assuming your have already installed Audacity, open Audacity 1.3b. On the first attempt, expect Audacity to crash and not respond. Force Quit Audacity. Open Audacity again. Begin using Audacity. If it crashes again, close all applications and repeat the process. If it doesn't work, play with the options of LineIn. This program saved my presentation. Note: Make sure your headphone set wires are correctly plugged in.
(Version 1.3b)