Built-in mic recorder program?

Garage Band would work fine, but you can do it in Quicktime, which might be easier.

 

QuickTime can do that, but I'm not sure whether QT Pro is required.

If you are going to do much with the audio file, Garage Band probably would be better.

For 3rd party: I've used Amadeus for years (now, Amadeus Pro). Amadeus Pro

 

Audacity is free, open source software for recording and editing sounds. It is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems.

 

I use Audio Recorder for this. It's a tiny little program that just does one thing well. http://www.versiontracker.com/dyn/moreinfo/macosx/17392

 

Thanks. I knew I had something like that. Forgot its name.