I am using KStars on a iMac with trackpad and a MacBook Pro (of course with trackpad). With all other astronomy apps it's easy + smooth to change the chart magnification with two fingers on the trackpad. With KStars it's impossible because it's too fast. Changing the scroll speed in the system Preferences doesn't help in KStars. Could you change that ?
I meet this question too, I am using Mac book pro. It also happened to Magic Mouse. Scrolling zoom in/out is too sensitive and it confuse me a lot. At least I hope there is an option that can disable scroll zoom in/out.
Git commit f31792d52ed8187d7f414422614dad91ad7feb03 by Jasem Mutlaq. Committed on 26/08/2017 at 14:52. Pushed by mutlaqja into branch 'master'. Introduce zoom speed scale factor to adjust mouse zoom scrolling issue. It is under KStars Options, Advanced --> Look and Feel CCMAIL:kstars-devel@kde.org M +7 -0 kstars/kstars.kcfg M +4 -0 kstars/options/opsadvanced.cpp M +325 -343 kstars/options/opsadvanced.ui M +1 -1 kstars/skymapevents.cpp https://commits.kde.org/kstars/f31792d52ed8187d7f414422614dad91ad7feb03