Increasing trackpad speed on a Mac more than the maximum allowed

You can increase trackspeed in System Preferences, but that only goes up so far.

To see the current speed, you run

defaults read -g com.apple.trackpad.scaling

Initially, this outputted in 0.6875.

To change it, you need to run

defaults write -g com.apple.trackpad.scaling <number>

Then

sudo reboot

Now your trackpad will be faster! I set mine to 4.