Go to OSX Daily to read How to Unsend Messages on Mac with Undo Send
Ever wanted to unsend a message? Maybe you typed out a quick response and said something you wish you hadn’t, sent something in error, or sent something that is no longer relevant. If you have ever sent a message you regret or wish you could retract, you’ll want to familiarize yourself with the Undo Send feature available in Messages for Mac.
Available for all iMessage conversations, you can use Undo Send to unsend any message sent from the Mac, whether it’s a text message, photo, video, gif, or any other iMessage that has been sent.
The Undo Send feature…