Apple includes a little-known feature in macOS that enables users to share their Mac's display via the Messages app without resorting to third-party software.
The feature is particularly useful for distance tech-support purposes, allowing remote control of screen operation, microphone communication and even copy-and-pasting functionality from one machine to another.
To use the feature, both parties need the latest version of the Messages app open, and as strong an internet connection as possible.
Users initiate screen sharing by opening their iMessage thread with the other party, clicking the ⓘ icon in the upper right corner and selecting the share button to invite the other party to watch or take control of the screen.
If users want the other party to take control of the screen, a request to do so must first be sent and accepted.
To mute the microphone, simply click a button on the screen-sharing window.
For security purposes, users should only share their screen with trusted parties.
Screen-sharing sessions should only be activated by requests that users have made; scammers claiming to be from tech companies should be reported as spam.
Apple included this feature on Macs as old as 2009, with screen-sharing compatible with both newer and older devices.
The feature enables remote control of another party's mouse and keyboard as well as screen operation, alongside the copy-and-pasting of text and images across devices.