I got a Dell Laptop Inspiron, running osx 10.6.8, build as Hackintosh, working pretty good (OSX86) with Smoke on Mac (Smack), FCP / compressor, im happy !!! on the website you can find compatibility with workstation / laptop for best optimum performance and compatibility for Hackintosh, not every PC will work good !!!
You can go up to 10.8 if you got the compatible PC.
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wiki.osx86project.org]