Music Software for Mac OS X?

tengwar writes "I'm an organist, and I sometimes have to prepare sheet music. I'd also like to do a bit of composition. I'm looking for music software for the Mac centered around standard notation. Playback would be nice, but it's not as important as a user interface that doesn't get in the way of plonking down notes on a stave fast enough for me to remember what I was trying to do. If possible I'd like something that will allow me to add the words for voice parts for hymns. Any advice?"