This actually ended up at the shop where the sax player had purchased the mixing table (with the rest of the gear) 2 years ago, after the vendor had certified him he would be able to plug in his macbook and do multitrack recording with <insert mac software name>. GĂ©rard showed up with the macbook and the table and asked for a demo of how if could be done, and after lots of sweating, forum reading, helpdesk phoning, they were able to upgrade from "the macbook can play sound in the table" to "the macbook can record the stereo output of the table", which, while being a nice improvement, is still far from the original promise.
Still, 2 years is a bit late for a refund, but from what I understood, he is in a very good position to negociate the price for a better mixing table...