> Macs however always have two-fingers secondary click; their magic mouse have > both (it's mouse-touchpad hybrid).
If all else fails you could still Control click on Mac iirc. This feature would be useful for Plasma on touchscreens though, faking a right click on *touch* long-press. Maybe that's an approach that's more pleasing to Martin G than doing that inside KWin which he said is the wrong place to do that.