Let's say you want a second screen for your Mac to extend or mirror your current display. If you're running macOS Catalina or higher and own an iPad, you can do it through a feature called Sidecar.

Apple has finally updated Sidecar to allow you to extend your Mac screen onto an iPad when it's in portrait, not just landscape. For now, though, it's fiddly, but here's how to do it. The iPad needs ...

While laptops are built to project their own displays, you can transform a spare Windows laptop into an extended screen for your main desktop. Whether you want to expand your screen real estate, or ...

Maybe you have a MacBook with a small screen or a Mac mini connected to a TV or external monitor, and you feel like you could use a second screen or device to extend or mirror your current display.