AVCHD Video Converter Mac enables you to convert M2TS, MTS, etc videos to all popular formats, such as MOV, MP4, AVI, 3GP, FLV, MPEG-4, MP3, etc.
http://hdconverterformac.com/mac-avchd-video-converter.html

Don't bother with this if you've gone to Snow Leopard. Some features do not work. I reported problems two weeks ago via nullriver.com and have not heard from them. I need to get my money back.

Someone really should change the description to include the fact that this also does music, and the rest of it's great features. I was nearly turned of this app, as from the description it sounded like just another video converter.

Great little app for converting video files to iPod format; it's converted pretty much everything I've thrown at it, including wmv and flv files.

Not a bad application but Hasn't been updated for an age.

Very capable and easy to use app. However, it hasn't been updated in several months, so I wonder if the developer has given up on it.