How to Change Scroll Direction on a Mac

Open System Preferences. There are two ways of doing this: Open the Apple Menu at the top of the screen and select System Preferences.... Open System Preferences from the Dock.

Find the proper section under the Hardware tab. If you're using a trackpad, select the Trackpad button. If you're using a mouse, select the Mouse button.

Open the "Scroll & Zoom" tab.

Click the checkbox next to "Scroll direction: natural". This will change the direction you scroll in, regardless of whether the box was checked or unchecked.