On macOS, the zoom-in tend to go more on the right side and down like diagonally inclined and it is hard to zoom-in on the center of the model. As a new cura user - I thought this is how it behaves (which is so odd but I have to accept it), so I search for tutorials and youtube videos only to find they are able to show how zoom function should behave naturally like everyone should expect. On the linux version however, the zoom and other navigation functions behaves naturally. I would say on the macOS version this is a serious bug in terms of navigation. The macOS version of cura 3.1 however is faster in performance when starting compared to the linux version which loads slowly (maybe due to loading of its own libraries). However, once the linux version completely started, it is really fast - faster than on macOS. I hope this serious navigation issue on the macOS version can be solved. I would love to work fully under linux but the sketchup program I used is on macOS. I used the same hardware (dual boot macOS and linux) for comparison of the cura 3.1.