I've been using iPhoto lately, and I've been using it a lot.
First to the RAW issue. Does Apple make use of RAW? Yes and no. When at first you load the RAW, the changes you make will use the RAW file as source and apply them, not wasting your precious data. However, it will save the changed file as a JPEG. Thus, next time you make a change, ...
I always fall for cellists. I love the sound of the cello. I love the shape of the cello. And look what the cello has to say on the subject. You'll notice that the last string is broken. The poor little thing, I felt like fixing it right away, but it wasn't mine ...