I also found info here, but still no solution.

And especially since so many people already wrote about this on all kinds of forums & communities.

completely not logical ! And another thing is: on Mac completely no issue with horizontal scrolling with Apple mouse !!!! Try to get some logic in that. What is also very troubling (and mind-boggling) is that for some people the Shift (or Shift-Control) works with Horizontal scrolling in Excel with a regular mouse, and for others this is not possible. Step 3: Press the Window + Ctrl + O key to open the virtual keyboard and turn on the scroll lock from here. I also (specially for this issue!) bought the Microsoft Arc mouse, but same issue, no horizontal scrolling in Excel, even with their own special horizontal scrolling mouse. Step 2: Uncheck the Scroll Lock in this list, it will not show in status bar even if the scroll lock is enabled. The big issue is: this worked very good (and so simple) in former Windows versions (just using Shift or Ctrl-Shift + scroll with a normal mouse up or down, couldn't be more simple, that was the perfect solution). I have this same problem too, and already searching for a very long time for a solution!! In all forums/Uservoices/TechCommunities i read, i see that MS does not come out with a(ny) feasable solution (or comment).

No scroll bar in excel mac