If your Bluetooth device won't connect in Windows and you receive Can’t pair Bluetooth keyboard, Check the PIN and try connecting again message; see this post.

On a Mac, you can just hit the Bluetooth icon in the menu bar and hit "Set Up a Device". Your computer will scan for devices, and your keyboard or mouse should pop up.

While it may seem almost obscene to some, you can actually connect an Apple Magic keyboard to a Windows 10 and Windows 11 machine. Here's how.