Force Click Not Working on Macbook
I had the same exact problem.  Drove me crazy trying to figure it out.  Simple Solution.

Open System Preferences, Trackpad

Under the Point &amp; Click tab make sure that the Look up &amp; data detectors is set to Force click with one finger.  Some how, mine got changed to tap with three fingers.  I know I didn't change it and I'm the only one that has access to it so its a mystery but now it works so thats all that matters.