I have a 2006 imac running os x 10.6.8, 2.16 intel core 2 duo, with 3 gb 667 mhz ddr2 sdram. Airport drops out of of connection while other things like PS3 have downloaded very large files (7gb!) The mac bottoms out sometimes not even having downloaded a gig, I have a 40gb internet connection which runs at just under 5meg per sec. Any thoughts why or any fixes most gratefully received! Cheers!