Thanks to 1% for helping unlock the 6D, and noisyboy for helping us figure out how to use it!
After updating to the latest "[113] Its New.zip" yesterday, I was able to get 7 buffers going and thus record 5-6 seconds of the good stuff (1792+). I think on the install guide you might include some pointers as to what settings the camera should be in for best performance. For example I needed to change picture format from RAW+JPG to just RAW, the various liveview options, etc... I am using a 64GB SanDisk Extreme 45Mb/s and it stays right around 39-40MB/s write speed.
Is it just me, or does the ML interface (trashcan) seem to have a very short timer on it? If you pause while navigating through the menus for just 2-3 seconds, it closes. And it seems like the timer doesn't reset itself, if you close the interface manually, the next time you open it the timer will have less time on it. This can be particularly frustrating when navigating through the resolutions....
I also noticed the exposure preview isn't always accurate when using "Canon" liveview mode. It seems that changing the shutter speed/ISO/aperture only affects the preview after 2 or 3 full stops either way. So if you only make a small adjustment, your video may not have the exposure you expect. What is the best way to preview/control the exposure that RAW video will use?
One workflow thing I haven't seen in these threads -- if you have Apple Compressor, it has an "Add Image Sequence" function that can render to ProRes or Unompressed 8/10 bit. Going from RAWMagic to Compressor to FCPX is a pretty quick workflow, even though it's not really taking advantage of RAW, you still get a pliable clip.
Also, I am a Magic Lantern newb so I didn't realize that 5X liveview zoom actually records at that crop, giving you a 1:1 crop of the sensor and defeating the nasty moire monsters. With my 20mm lens this is actually usable, giving me something like a 60mm field of view, although the resolved detail seems to suffer a bit.