Capture one & 5D mkII
Not 100% sure why.
Phase say its coming if that helps.
They blame Canon for being slow to release the SDK needed for tethered support. Hopefully v4.7 will fix this issue and a few of the other niggles with the software but Phase are being very tight lipped about release time scales.
|Waffles with fruits by Coolinarka|
from Food photography (desserts)
|Vestrahorn Frozen Reflection by Will B Milner|
from Ice cold