Apple doesn't put a middle-click button on its mice anymore. Instead, the company now makes two types of mice for its Mac devices—the trackpad (available for desktops via the Magic Trackpad) and the ...

If you have a new Mac or a new Magic Mouse, you’ll need to connect Magic Mouse to Mac before using it. This is the example same process for any Mac, from iMac, MacBook, or Mac mini and MacBook Air.