Help KE7 Firmware update using a Mac?


Does anyone know how to get the KE7 firmware update using a macbook?

(reason for update being that I've read on a few posts that it improves battery life: mine is currently a joke - 50% lost in under 5 hours when the phone was sat idle on the desk and wifi/bluetooth/GPS/data all switched off and background data off too, with brightness at 0%).

Any help much appreciated.