Shrink Trackpad on Macbook running Mojave I am running mojave (10.14.2) on a 2018 macbook. I keep accidentally hitting the trackpad while typing. None of the solutions in this question still work. Does an updated solution exist?
The simplest solution I've found which works on any recent version of MacOS is turn off tap to click in System Preferences &gt; Trackpad &gt; Point &amp; Click.

You can use this applescript to quickly toggle tap-to-click on and off. On MacOS open Applications &gt; Utilities &gt; Script Editor and paste the code from this script:

tell application "System Preferences"
    reveal anchor "trackpadTab" of pane "com.apple.preference.trackpad"
end tell
tell application "System Events" to tell process "System Preferences"
    click checkbox 3 of tab group 1 of window 1
end tell
quit application "System Preferences"


Then select File &gt; Export and save in Applications but also make sure to select File Format &gt; Application before saving. 

If you want to make it very easy to run the toggle on and off, you may want to add a custom keyboard shortcut which would just run the toggle application.