I use razer lachesis as i like to game hence the mouse , no official osx driver or software for it tho but usb overdrive is very good not as good as the razer software for windows but its the best there is for osx

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Snow Leopard 10.6.1

Windows 7

Asus P5LD2-VM DH (R 1.0 ) - ECS Gforce 8600 GT (512 meg ) - Intel Pentium D 930 3.0 ghz - Network = Intel Pro/1000 - sky DG934G modem/router - HD = 1x200 sata 1x80 sataII - pioneer dvd+R/RW 110D ( sata ) - Audio - Hda 882