Is there any PPC emulator (for either Intel Macs or any Linux) which can run MacOSX 10.5 PPC?
My current research only points me to PearPC and the latest post/release was from 2011. On the homepage, they say that they have support for MacOSX 10.3 with some caveats. Also, it doesn't seem to emulate a soundcard which is relevant for me. Some totally outdated forum posts are asking about MacOSX 10.5 but without any real answers, e.g. here or here.
Best Answer
To do a 100% accurate test your best bet would be to get an actual PowerPC Mac. Alternatively, you can install 10.6 (Server) in a Virtual Machine, which can test PPC Applications through Rosetta.