Sorry to push this thread again, but I have a similar question ...
As far as I understand the problem Canon did disable the Live-View mode (tethered shooting the correct term ? ) in the days before releasing the EOS M.
Hence the EOS M is the only EOS which does not work 100 % with the EOS Suite/SDK. As a side note, Apples default picture import tool provides a tethered shooting mode, if the the camera supports it. In case of the EOS M it shows the mode but breaks with an error if one wants to use this feature.
In the wiki I read about remote control with PTP, thus long story short:
Will my EOS M be able to transfer the live view to my computer via USB with the Magic Lantern software ? And can I capture a picture via USB ?
Thank you