I have asked for this before and always gotten an explanation why it does not make sense, but here goes again:
It is a standard convention on the Mac for <CTRL-+> to zoom in and to zoom out.
As I have mentioned before, Rhino repeatedly stops responding to trackpad commands on my macbook and then refuses to respond for extended periods of time. I can scroll with the keyboard but I cannot zoom. If I could zoom, some of the misery would be alleviated.
I find most of the Mac U/I awkward, but I’m a Windows person and that’s to be expected, or so I’m told.
I can use the Mac tools but the Windows tools seem more intuitive to me.
Mac Rhino was not designed with Windows users like me or my preferences in mind.
That was the point.