Mac OS X includes a great feature called Screen Sharing which allows for the remote control of a Macs display. This means you can easily access a home or work Mac while on the go, or even do something like remotely troubleshoot a parents computer. Screen Sharing will work across just about any supported Mac OS X versions too, a Mac running MacOS High Sierra, Mac OS Sierra, OS X El Capitan, Yosemite, Mountain Lion, Mavericks, and anything newer, can connect to a work Mac running Snow Leopard, and so on. Screen Sharing is extremely easy to setup, follow along or watch the video below for a quick demonstration. You can also directly access and use the Mac VNC client Screen Sharing for this purpose. Anything left open from the user you logged in as will be visible, and you have full access to everything on the Mac.