Been looking around for any answers online but could not find it.
Im on OSX Sierra with latest Krita 3.1.2
And some of the keyboard shortcuts dont work for me.
Some of them i can do workarounds, but this one i havent found a work around for:
For Zoom, using zoom with ctrl + space + left mouse button does nothing. I just want to use the zoom tool, and just be able to zoom in and out smoothly with the mouse.
ctrl + middle button does nothing either..
Any ideas why its not working?

Well, this actually seems to be a problem with Sierra and Qt -- Qt is the development foundation we use. With El Capitan, there are also a few problems, but those are the normal kind, where cmd vs control and option vs alt make things more difficult. On Sierra, some key combination just don't seem to generate the same kind of events. We're trying to figure out where the problem is, exactly, but I haven't dared upgrade our single mac to Sierra yet, and running Sierra from an external HD turns out to be too slow to be useful.

I see. Thanks for the quick response.
I should just install ubuntu Linux lol. But haven't gotten around researching how hard/easy it is to dual boot alongside OS X.