Adjusting the area for center middle click on the Magic Mouse

[rxhanson]

You can adjust the area for the center middle click on the Magic Mouse using these terminal commands:

defaults write com.knollsoft.Middle oneCenterClickMinX -float 0.34
defaults write com.knollsoft.Middle oneCenterClickMaxX -float 0.66

Those are the default values, so you'll want to adjust them as desired. 0 is the leftmost value and 1 is the rightmost.
You need to restart the app for them to take effect.

Note that on old versions of macOS (< 10.15), right clicks would override the middle click for area overlapping that region (> 0.55 for standard right click).

You can also adjust the y values if you want to limit the area to a smaller rectangle with the following terminal commands:

defaults write com.knollsoft.Middle oneCenterClickMinY -float <value_between_0_&_1>
defaults write com.knollsoft.Middle oneCenterClickMaxY -float <value_between_0_&_1>

0 is the bottom and 1 is the top.

I might at this to the UI at some point.