MacBook – How to enable Normal Scrolling on MacBookPro 10.8.3

Safari can open PDFs using Preview without the need for Adobe Reader to be installed. In my experience, Preview in Safari is faster and smoother than Adobe's Reader plug-in.

See this question for how to disable the Adobe plug-in.

USB Overdrive can do that but it's not free.

You could also add a rule like this to KeyRemap4MacBook's private.xml. The behavior when scrolling multiple ticks was a bit weird on the mouse I tested with; it only scrolled a full page about once every 0.5 seconds.

<?xml version="1.0"?>
<root>
    <item>
        <name>Test</name>
        <appendix/>
        <identifier>94D0530F-70BA-4DA9-BD45-C223A689A807</identifier>
        <autogen>--ScrollWheelToKey-- ScrollWheel::UP, KeyCode::PAGEUP</autogen>
        <autogen>--ScrollWheelToKey-- ScrollWheel::DOWN, KeyCode::PAGEDOWN</autogen>
    </item>
</root>

You can also increase the scrolling speed with defaults write -g NSScrollWheelMultiplier -float 200.