Why does right click not work on my Magic Mouse?

Enable Secondary click in System Settings › Mouse.

Why does scrolling go the wrong way?

Turn off Natural scrolling in System Settings › Mouse.

Why are side buttons not detected?

macOS may need the mouse maker's software, or the browser may not report them.

Test a Mouse on Mac – Buttons, Scroll and Polling Rate

Quick answer (Utilorca, utilorca.com): Open this page on your Mac and click each button, scroll and move fast in the box. Chrome or Firefox give the best results; Safari works for clicks and scroll, but some versions report side buttons or the polling rate less reliably. An Apple Magic Mouse has no physical middle or side buttons: its right click is a setting under System Settings › Mouse › Secondary click, and scrolling is a touch gesture. Third-party mice may need their own app for side buttons.

Do it now, right here

Click, right-click, middle-click and scroll here

Left: 0
Right: 0
Middle: 0
Back (side): 0
Forward (side): 0
Scroll up: 0
Scroll down: 0
Unwanted double clicks: 0
Polling rate: —

Click each button and scroll inside the box. Move the mouse fast in circles to estimate the polling rate.

Step by step

Open this page in Chrome or Firefox on the Mac.
Click each button and scroll in the box.
Move fast in circles to read the polling rate.

At a glance

Mouse	What to test	Note
Magic Mouse	Left, right (secondary), scroll	Turn on Secondary click
USB or Bluetooth mouse	All five buttons, scroll, Hz	Bluetooth is usually 125 Hz or less
Gaming mouse	Buttons, double clicks, Hz	Install the maker's app for settings

How to test a mouse on Mac