"t" key always pressed on mac For some reason, my Mac keyboard always thinks that the "t" key is always being pressed. However as you can see I can still type in the letter t, but it comes out delayed compared to the other keys. I think it is a software bug as the key still works fine, but on some pages the t key just gets spammed. Oddly enough, shift+t won't give me an uppercase t, but all the other letters work fine (and my caps lock has been converted to a backspace, so I can't test that (by choice)). this has happened before, but typically goes away after a restart, but this one time a restart didn't help. 

Edit: Currently on Macbook Air (1 generation ago)
I hate to be the bearer of bad news, but most likely your "T" key has a crumb of food or some dust stuck underneath it.

Canned air sometimes works, but sometimes will jam it in there for good.

If it's still under AppleCare, bring it in to an Apple store and look distressed...sometimes it helps to cry a little bit and/or beg. Personally, I just grab a Genius' pant leg and refuse to let go while sobbing loudly.

Generally they can replace the key and/or keyboard, but you may need to go without your laptop for a week.