Put this as /etc/X11/xorg.conf.d/50-mtrack.conf

3 finger drag in Linux with xf86-input-mtrack.markdown

Missing your 3-finger window drag from OS X in Linux?

Fear not, for this fork of xf86-input-mtrack supports 3 finger drag.

You only need to add these lines to your /etc/X11/xorg.conf.d/50-mtrack.conf:

     Option "SwipeDistance" "1"
     Option "SwipeLeftButton" "1"
     Option "SwipeRightButton" "1"
     Option "SwipeUpButton" "1"
     Option "SwipeDownButton" "1"
     Option "SwipeClickTime" "0"
     Option "SwipeSensitivity" "1000"

NOTE Make sure you don't have any conflicting entries, that is, duplicate SwipeLeftButton entries and so on. I'm an idiot, so I made this mistake and couldn't figure out why this wasn't working until I looked at my config again.

50-mtrack.conf

Section "InputClass"  
  Identifier "touchpad"
  Driver "mtrack"
  MatchIsTouchpad "on"
  MatchDevicePath "/dev/input/event*"
  Option          "Sensitivity" "0.35"
  Option          "FingerHigh" "12"
  Option          "FingerLow" "1"
  Option "PalmSize" "40"  
  Option          "IgnoreThumb" "true"
  Option          "IgnorePalm" "true"
  Option          "ButtonMoveEmulate" "false"
  Option          "ClickTime" "25"
  Option          "BottomEdge" "30"
  Option "SwipeDistance" "1"
  Option "SwipeLeftButton" "1"
  Option "SwipeRightButton" "1"
  Option "SwipeUpButton" "1"
  Option "SwipeDownButton" "1"
  Option "SwipeClickTime" "0"
  Option "SwipeSensitivity" "1000"
EndSection