When Apple announced the new glass multi-touch trackpads on their laptops unibody (MacBooks and MacBooks Pro), the main novelty was certainly the absence of an inferior button. Now, the entire trackpad is a large button, which can be quite customized by the user.
I particularly like to configure my system so that the click works with just one touch on the trackpad, that is, I don't need to press it. There are those who prefer, however, not only to feel the touch, but also to hear it. Apple thought about it and did a very good implementation on the new trackpads.
But who thinks that noise is too loud / boring? Calm down, there's always a solution.
Fortunately, it's quite simple. First of all, turn off your notebook and wait for it to cool down a bit. Now, turn it upside down and pull the lever to release the plate that protects the battery. Remove it and you will face the bottom of the trackpad.
The little secret is right here: note that right in the center there is a small screw. Apple left it there on purpose, so that everyone can adjust the click of the trackpad as they see fit.
Use a very small screwdriver and tighten or loosen it, as you see fit. Turning it clockwise reduces the click depth, eliminating the annoying sound. In the anti-clockwise sense, the click becomes much more noticeable. But don't overdo it, so you don't damage your Mac, huh? Go little by little, until you reach a stage that best suits you.