Hi Anne, and welcome!
I am a "sporadically retired" caterer and cake decorator, which means if someone can twist my arm just right I will cater and or decorate!
I am going a similar route to you, except instead of an Ipad and MacGourmet I have a net book and MasterCook. This way I can get a recipe from my files, or google or search within DC and have the computer close by so I don't need paper, can make changes, adjust servings, etc. without damaging a tree! When I had my MasterCook on my PC, I would go and print the recipe and then stick all the printed recipes on top of my desk. Next time I needed the same recipe I would print it again rather than going through that huge pile of paper. I love this new method.
Sorry I don't know anything about MacGourmet, but there are lots of people here and I am sure someone can help you!