Lee, SN is probably the most mac friendly heavy duty planetarium app there is - especially seeing the OpenGL graphics engine runs best on macs it appears - so I dont understand the clunkiness thing?. Have you got plenty of ram? (have you got the star mag/numbers up to high?) - it is very ram hungry at full tilt boogie - I have 1.5 gb ram in my dual 1.8mhz G5 tower (very soon to be 2 gb

) and it still wants more at max evrything! maybe a bigger graphics card would improve it too. mind you i am still only using SNP 4.5.2
Some tips
- I dont know if its the same in your (i am assuming SNP 5) version - but in my old version 4.5.2 The allsky view was my favourite tucked away feature i found - going from the default 100ºx57º fov to 191ºx124º by clicking just under the slider button for fov at top right hand corner - scroll down and untick by selecting "restrict max FOV to 100º"
also have a look at
http://groups.yahoo.com/group/StarryNight/ do searches - this is important site for knowing snp inside out.
also depending on your mouse (get a PC mouse like a logitech with all the wheels/bells/whistles - u can scoll/zoom in and out with the wheel as well if you click on screen ect.) forget those stupid mac double click mouses - why they are hanging onto to that design since OSX came out and allowed you to right click ect. I dont know? beats me
also make sure you up to date with patches - 5>5.0.5 atm, when I updated from 4.5>4.5.2 the difference was absolutely HUGE!! it was like a totally new program!!!
I find SNP to be a massive program to get know intimately - I am still learning plenty of stuff all the time nearly two years later!!
...anyway enjoy that all-sky ccd mosiac they have in version 5 pro (if thats what you have)
hope that helps
Kearn
EDIT: ps
some cons to snp - 1/ I hope they improved the search function in snp 5 - coz it stinks in 4.5. - in fact it was famous for this major fault
2/not the best program for driving scopes I have read - i think that is improved in 5 a bit
3/hate the auto update system - dont like the idea of having to open a port in firewall just to update - and their update server is weird and offline half the time apparently - and bad luck if you dont have broadband!! i just manually update stuff i want, like new comets