hi, i have install snow leopard (retail DVD) on my thinkcentre M57 with graphic card ATI 4350. using iboot and multibeast method. works with exception of dvd-rom drive. and basic display (i.e 1024 x 786 resolution) no driver for the ATI 4350 card. I've read i think from this forum that someone also successfully install mac (?) on their thinkcentre M57 with ATI 4350 card and works.