Pinch to zoom broken in Yosemite I had pinch to zoom working fine after installing Yosemite but after a month or so it's stopped working. The setting is enabled in Trackpad > Scroll &amp; Zoom and it seems none of those gestures are working anymore. I can use 4/5 fingers outwards for Expose though. 

How can I get the full functionality back?
Turn off pinch to zoom in preferences, then turn on again. This has worked for me before. If that doesn't work then doing a reboot will usually fix any and all trackpad issues. Problems after a reboot? Check out the above slightely more extreme ways around the problem..