I really like the interface for "Connoisseur" by Little App Factory. It borrows a lot from iTunes (in fact, they bill the app as iTunes for recipes), but this makes it really easy to use.
I can't say I've used it extensively to manage recipes, but I have entered several family recipes just to have them saved somewhere besides the shoebox.
I have downloaded six trial versions of recipie management software and have been underwelmed with ALL of them. I am settling for A Cook's Books for now (it seems to be the best of a non-impressive offering.) I just found out that COOK'N is considering development of a mac version. Theirs is far and away the best system I have seen - but they currently only offer it for pc.
If there is enough interest they will pursue the mac version. You can show your interest by reading: