Here are some helpful links about headset adapters:
- Our very own Headset Buddy Compatibility List for those of you who aren't sure what you are looking for.
- A good explanation of different types of Headset Jacks
- Wikipedia explanation for different TRS Connectors.
- Apple discussion forum explaining why you can't use a PC headset (or similar) with a Mac.
- MacBook compatabilities - http://forums.macrumors.com/archive/index.php/t-437418.html