Before we get started
After spending over 20 years working with Macs, both old and new, theres a tool I think would be useful to every Mac owner who is experiencing performance issues.
CleanMyMac is highest rated all-round cleaning app for the Mac, it can quickly diagnose and solve a whole plethora of common (but sometimes tedious to fix) issues at the click of a button. It also just happens to resolve many of the issues covered in the speed up section of this site, so Download CleanMyMac to get your Mac back up to speed today.
Autocorrect in OS X is a polarising feature; some users love it, while others abhor it. One of the reasons it is so disliked is it’s uncanny ability to mess up, often turning a small and innocuous spelling mistake (or brand name) into something entirely different, rendering what you have written completely incomprehensible.
Another common cause of frustration is the suggestion feature, which forces you to stop typing and click the tiny X to dismiss it. Recently after searching online for an answer to this I discovered many sites incorrectly stating that the Escape key dismisses the suggestions. While this may have worked prior to El Capitan, it certainly is no longer the case.
You will be pleased to know however, that it is still possible to dismiss and even choose from multiple suggestions by simply using your arrow keys, see below:
To dismiss suggestions
To select a suggestion
To choose suggestion
If you still would rather not use autocorrect take a look at: How to Disable Automatic Spelling Correction in Mail and Safari