Does Silverlight 4 install on a non-Intel Mac?
A:
No. This link implies that only Silverlight 1 is installable on a PPC Mac. Apple Downloads site. Anything later requires OSX 10.5 or higher, which is Intel-only.
Here's another link, from Microsoft's FAQ site, which states OSX 10.4.8 or higher. Again, OSX 10.4.8 is Intel only.
ChrisW
2010-09-27 18:25:47