Tom,

Remember that Print Music is the cheap version of "Finale" and does not do everything that Finale can do.
I don't think Sibelius do a scaled down version.
All I know is that from my experience Finale [the full one] is great, and has worked on my intel Mac with no problems.
I corresponded with Finale at first, but the guys on the forum are much better!
So when you finally make up your mind...........!