Bryce 5.5 had trouble with 10.4 and that is why when I got my Tiger machine, that I left the other machine with 10.3.9. I still havent gotten around to it, but they are side by side on the desk here.
But Daz came up with a fix, I downloaded it, put it on the Tiger machine and Bryce runs fine.
But the free Bryce, v 5.0, that they are giving out now, will not run on Tiger properly. But if you have a 10.3.9 Mac, go ahead and get it and give it a try, its tons of fun!
I love Bryce, tho Im not very good at it yet. There are great lessons available.
If you do get it, and it seems to take over your whole screen, just mouse way up to the top or sides and you will get your menu bars back. Or if you need more, go up and 'Hide Bryce' for a while. It does take a bit of horsepower when you are rendering a picture at a high resolution.
If you want the links to any of this stuff, let me know.
I cant remember who, but there is someone here at TS, who has a really nice Bryce gallery.
Jane