So I have a Macbook Pro (old, from 2007) and I am running a Steam game (Team Fortress 2). I want to use voice chat but the problem is that Steam wont recognize my internal microphone. I try to click on the "change device" button in steam but no window opens. Whenever I try to test the microphone on steam nothing happens. The game runs fine on my mac besides the lack of mic recognition. Any ideas on what's wrong?