Quick time player
I've taken the SD card from my security camera which says it can be played on devices that support MPEG4 files, but I can't play it on the Macbook which I thought would support MPEG4. I'm not very up with adding software, so can any help me please. I get a message directing me to help, but it doesn't help me I'm afraid. Quicktime opens, but says it can't play the video.
MacBook Pro with Retina display, OS X Mountain Lion (10.8.1)