How to Update Canon EOS 5D Mark III's Firmware (Macintosh)

Download EOS 5D Mark III's firmware here: https://www.usa.canon.com/internet/portal/us/home/support/details/cameras/eos-dslr-and-mirrorless-cameras/dslr/eos-5d-mark-iii?subtab=downloads-firmware Firmware 1.3.3 now available! Steps: 1. Format memory card (camera) 2. Download & install Canon's firmware (computer) 3. Move "5D300133.FIR"* file onto your memory card (computer) 4. Update firmware (camera) 5. Enjoy Firmware Version 1.3.3 incorporates the following improvement and fix. Improves the AF controllability when shooting in Live View mode with a wide-angle lens (fixed focal length or zoom). Corrects some incorrect indications on the "English" and "Russian" menu screens. "Canon has released firmware updates for its EOS 5D Mark III and EOS-1D X DSLRs. Both updates claim to improve the user's ability to control autofocus in Live View mode when wide angle lenses are used." - dpreview staff Source: http://m.dpreview.com/articles/3105966833/canon-releases-eos-5d-mark-iii-firmware-1-3-3-eos-1d-x-firmware-2-0-7 PRECAUTION: Make sure your camera's battery is fully charged or have an AC power adapter connected. Shutting off the camera while operating a system update may corrupt its data!