Usb port mac osx 10.6.8

I have the arduino clone mega 2560 with chip h340g on mac with old osx 10.6.8 and i found only the four standard port and not the usb for arduino. I have arduino 1.0.5 and i install same driver for the chip but i'am not risolve the problem. Please help me! Thanks

Have you solved the problem? I have the same with ch34x drivers.

I could not make it run due to "i386 architecture is missing".

I've tried versions down to 1.3 CH34x with no luck.