Transcribing software?

I've been finishing up an art project that involves photos and interviews. I'm getting ready to do a show and I plan on having excerpts from the interviews posted along with the photos. The problem is that it takes a tedious amount of time to transcribe each of the interviews even though I am a fast typist. I wanted to know if there are any good programs I can download for free (or a trial) so I can get things done faster. I'm looking for something that I can just play the recordings and it will transcribe it for me instead of me having to type everything. It also has to be for a mac.