I use HyperDock for this: http://hyperdock.bahoom.com/ http://hyperdock.bahoom.com/ It's mainly focused on modifications for the OS X dock which I don't use, b

I use HyperDock for this: http://hyperdock.bahoom.com/ http://hyperdock.bahoom.com/ It's mainly focused on modifications for the OS X dock which I don't use, but it also does alt drag window movement, and alt + num pad for tiling windows. It costs a a bit of money after a trial period, but it's the most reliable replacement for alt drag I've found so far.