How do I do a right click on a 'magic mouse'? We’ve just won a brand new iMac. It came with an Apple keyboard, Magic Mouse and Magic Trackpad. The keyboard works well, although it's weird not having a numeric keypad. The trackpad also works well.

But while the mouse seems to connect fine and I can scroll and click ok, for the life of me I cannot figure out how to do right-clicking on the mouse?

I did try looking for a Control Panel to try and fix this, but there isn’t one.
There is no Control Panel like in Windows or the old Classic Mac OS systems of years ago. Instead, what macOS has are System Preferences. You can access this from the Apple Menu and selecting the System Preferences… option.

Once you do you’ll see a list of Preferences Panes you can access by using a single mouse click. There are two you can utilise to address your issue, because both the Magic Mouse and Magic Trackpad can be set up to do what you’re calling a right-click. 

Below are screenshots of both the Mouse and Trackpad preference panes:





Note that when you look at both these preference panes you will see options for a Secondary click.  This is the setting that will enable the right-click you’re looking for.

I suggest while you’re in System Preferences you also have a play with what else is available.

Finally, you may find the Mac tips for Windows switchers site of great interest to you.