After the Okapi for Mono package 2 days ago, another package useable on the Mac has just been released: OpenWordFast, a macro for OpenOffice.org that accepts WordFast translation memories.
The project was registered on October 8th, which means that it is yet a little early to expect function parity with WordFast, currently it only accept 100% matches from the TM... But since the project is free software (GPL) I have no doubts that it will find a lot of contributors.
Update:
I received a mail from Oleg, OpenWordFast's developer after congratulating him for his work:
Hi, Jean-Christophe.
Thanks for your post. But OpenWordFast in the raw Beta stage. I'm not tested it on Mac yet.
Its lacks of vital functionality - Glossary, Terminology Recognition, search of not full match TU.
But I plan to work on this list in the future releases.
Best regards, Oleg Tsygany.
Here we go !