May sound silly, but for the past few weeks, if I'm on my Macbook Pro (mid-2012) late at night (say, post-1 a.m.) - and I often am! - my trackpad will stop working. I can't move the cursor or click, etc. But I can grab the mouse and it works just fine.
I thought it had something to do with heating up too much or the laptop not being restarted in along time. I've remedied both of those issues numerous times and it doesn't matter whether I just restarted it or not, it simply won't work. Then, sometime in the early morning hours, it decides it's back and I don't have a problem with it all day.
Any thoughts on this?