This might sound like a strange solution, but you should try using your Magic Mouse on a different surface.
I recently changed my mouse mat/surface and this sort of strange Magic Mouse behaviour has all but disappeared.
My old surface was so worn/used it had started to become shiny in patches. My guess is that an inconsistent surface is causing the mouse to report abnormal patterns of signals, which in turn causes all manner of strange behaviour in general use.
I recently changed my mouse mat/surface and this sort of strange Magic Mouse behaviour has all but disappeared
Thank you thank you! Messed with all the config changes mentioned and nothing stopped my Google Presentation from scrolling/tabbing through slides on a hair trigger.
All other aspects of mouse function, such as tracking, worked fine on my rubber mouse mat (no shiny spots).
Put the mouse on my hard white (matte) tabletop, and the issue disappeared! Why on earth would touch sensitive scrolling on the top of the mouse be affected by the mousepad below I don't know.
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All other aspects of mouse function, such as tracking, worked fine on my rubber mouse mat (no shiny spots).
Put the mouse on my hard white (matte) tabletop, and the issue disappeared! Why on earth would touch sensitive scrolling on the top of the mouse be affected by the mousepad below I don't know.