Recently, I discover that we can actually lock the keyboard and trackpad while we use the mac.
I found that this function is particular useful because when some kid or pet try to mess your computer up, it can protect your computer efficiently, all you have to do is press 5 times of the "option" key.
well, first you have to go to the system preference and then find the accessibility.
then find the menu of mouse and trackpad.
click on the option.
same thing can apply to the key broad.
well, in case you want to know more, here is a video that shows the effect of this function.


























