Locking the keyboard but nothing else on your Mac requires a third-party app; but in most cases, you don't actually need this. Whether you want to lock the keyboard on a Mac to clean it, or you have young kids, or a mischievous pet that likes to lay across your keyboard, the easiest way to protect against unwanted changes or entries in text fields is to simply lock your Mac screen.

I tend to feel inspired to respond to emails during inappropriate times, like during a work meeting, which is why I love the option to schedule an email even though I've already written it. Another reason to schedule sending an email is if you promised to remind someone of an event or task and don't want to forget. I'll teach you how to use the new Send Later feature!