I bought a macbook last november 2015.
Few weeks ago, after only 7 months of use, I noticed that the "silent click" became impossible.
Even after a complete reset of the machine, impossible to get again the silent click.
Call to Apple support, then go to an apple premium reseller : pression sensor out (immediate diagnosis by the technicien).
Trackpad has been changed, then everything became OK.
This experience can guide people ...
