We have a sort of catch 22
MAC OSX supported in 4.1 but not in 4.0
Vista Agent supported in 4.0.4.0 + but not In 4.1
http://www.cisco.com/en/US/products/ps6128/products_device_support_table09186a00807600e1.html#wp43982
CCA releases 4.1(0)/4.1.0.1/4.1.0.2 and 4.1.0.0/4.1.0.2 Agents do not support Windows Vista
Only 4.0(x) releases starting from 4.0(4) and 4.0.x.x Agent versions starting from 4.0.4.0 support Windows Vista client operating systems.