Which asus motherboard support mac operating system

That would be the APPLE built one.

Google fue tells me to check Hackintosh Instructions, Hackintosh How To Guides @ Hackintosh.com Life hacker also ran a Mac OSX on a stick (USB) article recently. It I best to start with as neer a configuration to a factory Mac as possible then it should go fairly easy. There has to be a Hackintosh forum somewhere.

http://insanelymac.com

http://tonymacx86.com

The two best forums for what you want to do.

Basically if you have a Intel capable motherboard and a NORTH AND SOUTHBRIDGE that is intel, its pretty easy. Also a realtek audio and realtek ethernet.

If I were you I'd go to www.tonymacx86.com and register for an account, then download uniBeast.

From unibeast you can create a bootable USB thumb drive (8 gigs) that will let you boot LION and install it onto a PC with compatible hardware.

There are some good guides on the site as well to help you out.

I've built 7 Hackint0sh's now. Currently I am writing this from my Hackint0sh i7 6 core with 24 gigs of ram, liquid cooled with a GTX 590 graphics card on OSX LION 10.7.2