Disclaimer: There is no alternative to real Mac, if you like Mac go and buy it. If buying a real Mac is too much, you can at least buy a license for Mac OS X Snow Leopard which costs $29 only.
Last Saturday I was successful in installing Snow Leopard on Sony Vaio with Core i3 Processor. I have tried many distro’s in past 2 years and I can tell you it is not easy to install on any given PC.