Hey guys I have a question to ask about using my australian macbook (late 2009) over in america and canada. I know I have to buy a power adapter to fit the wall sockets, but do I also need to buy a power converter? In australia we have 240volts and america/canada have a lower level of volts. So will my macbooks power adapter just beef up the amount of power it gets from the wall socket automatically or will I need to invest in a converter? Also the same question for the iphone charger. I'll be taking my iphone over with me and will sometimes be using that charger that comes with the iphone.. Thanks!