I have k790i and i use it with mac leopard(10.5.1).It is detected by the mac without any problem and driver.it is function as both modem and Ethernet Emulation(usb internet should be on).using it as a modem we have to only change the vendor to sony ericsson.But Ethernet Emulation also works great without no problem and also it is easy to use to connect to internet.But flashing driver does not exits in mac.