In one sentence, describe what the following article is about:

Click the Apple logo in the top-left corner of the screen. A drop-down menu will appear. This option is near the top of the drop-down menu. It's in the System Preferences window. Doing so opens a new window. This tab is at the top of the Keyboard window. You'll find it at the top of the Keyboard window. Doing so will prevent programs on your Mac, including WhatsApp, from correcting automatically your typing.

Summary:
Open the Apple menu . Click System Preferences…. Click Keyboard. Click Text. Uncheck the "Correct spelling automatically" box.