New answers tagged multi-touch
killall Dock Worked for me as well. Macbook pro 2014 OS X 10.9.5
I have "Enable dragging" under Acessibility turned off and "Tap to click" turned on under Trackpad -> Point & Click. Everything both clicking (by tapping) and dragging works on my internal trackpad.
It seems like apple moved the option for enabling tap-to-drag to the accessibility pane. You can enable it there:
I also tried the terminal command on Yosemite, it didn't work for me. And then I tried uncheck "Swipe between pages" in mouse settings, and it worked.
killall Dock In the terminal fixed this for me. In my case, only Mission Control gestures had stopped working (three finger swipe left/right to switch spaces, three finger swipe up for overview).
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