See, this is a real Mac OS. Ken Fager has put the old Mac OS X system to his NDS. He showed us right here in the Flickr. It is running the old version 6.0.1. To do that, you need a NDS Flash card first. (the hardware you can buy it here.) Then, download the Mini vMac DS. Put the Mac Plus ROM into the “vmac” folder along with a System 6/7 install disk. You now have the NDS with Mac OS.

[via TUAW]