Hi Marc, thanks!

> I don’t know if this has been pointed:
>
> On the Mac version : Hovering on a viewport and pressing middle button doesn’t pan (Wacom Intuos 5).
> Left clicking in the viewport first works.
>
> If I hover and use the touchpad it works ok.

I was able to track this down to a bug in the Wacom driver, some information here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=8731.101

I sent in a detailed bug report a little over a month ago with a simplified standalone program that reproduces the same behavior. I hope that they'll be able to fix it in their next driver update.

- Michael