If you use the Messages app for many conversations from your Mac, you may have a few people you’d like to prioritize. By pinning a conversation in Messages for Mac, that person and message thread is always at the top of the Messages list, which is particularly helpful if you get tons of different texts from many different people, and some of your favorites are getting lost in that sea of messages.
The more messages you get, the more difficult it becomes to keep track of all your conversations. Therefore, it’s important to separate the important message threads from the rest. Apple has made this possible by adding a new pinning feature to its Messages app. You can pin the threads that matter to you to the top of the conversations list indefinitely.