This is more of a useful tip than a secret. If you've got Back to my Mac set up, your other Macs will appear in the Finder sidebar. Just select one and then cli

This is more of a useful tip than a secret. If you've got Back to my Mac set up, your other Macs will appear in the Finder sidebar. Just select one and then click "Share Screen…" Other Macs on the local network may show up with the option too.