I've been trying to figure this out for a few days now... I want to install the new magic lantern on my 5d and it mentions that you should do a "low-level format" of the card in camera. I can't seem to find a way to do this in-camera on the 5d... i see on other Canon DSLR's that you can select this as an option. Does anyone know if this needs to be done for the 5d and if so, how? If not in camera, is their a software for the mac that I should do this with? I've formatted the card in-camera and have the files loaded on it but I'm afraid to pull the trigger and update the firmware with this card since I haven't figured out the "low level format" thing.
Any help would be greatly appreciated!