Operating system: Darwin-18.5.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro Vega 56 OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.8.38
Broken: version: 2.80 (sub 60), branch: blender2.7, commit date: 2019-05-07 19:17, hash: rB3dc9da3a74ee
Short description of error
When using ctrl + drag on top of magic mouse to zoom in and out of the shader graph, the zoom is very fast and it either zooms out so you cant see the nodes or zooms in so far you cannot see anything.
It is almost like the zoom is stepping between very large increments.
Exact steps for others to reproduce the error
using a mac with a magic mouse open the shader editor and hold ctrl and try to zoom in and out using the "scroll wheel"