I recently went and bought a new 60w magsafe power adapter because my charger broke. I was told i had to download an update so the charger would work because my computer is white macbook and was purchased in 07. When i tried to download the update a alert popped up saying the update would not work because my software had to be OS x 10.5 or newer and mine is 10.4.11. Is there any update that will work with my software??