I run EUAE on my Intel Mac Mini. It can do it but, as has been mentioned, it is not as good as WinUAE. There's a lot of software for creative people on the Mac but they all have a price.
SamuraiCrow is right. Here is my take:
I ran different versions of UAE on different Macs. It worked fine. However the framerate and sound delay was significantly higher than on Windows XP on the same machine (with the intel Mac). But good enough for many games and all applications. There is a configuration tool called HiTorro that will give you basically the same options as WinUAE but has some quirks with the handling of multiple configuration files. UAE on the Mac runs stable and works well with the HFS+ filesystem, if you are using it instead of a HD-file.
Mac OS X used to be more open when it first arrived in 2000. It still has a lot of the UNIX DNA it came with. Apps have become significantly cheaper, but it has become quite patronizing lately, which made me use the mac less and less during the last two years.
