If you want to sync iMessages between iPhone and Mac, you should sign in the same Apple ID on both devices. Enter your verification code, if you have turned on two-step verification or two-factor authentication. On the pop up window, input your Apple ID and password then click the 'Sign in' button. Start the Message app from your desktop dock, or you can find it in Applications folder. Similar to using iMessage on iPhone, you have to set up and activate iMessage on computer first. One benefit of this service is available to both iOS devices and Mac computers. IMessage is a popular instant message services, launched by Apple. Part 3: How to transfer iMessages to computer.Part 2: How to Use iMessage on Windows PC.Part 1: How to set up iMessages on the Mac.If you are appetite on message and want to save money on SMS fees, you will find our post is useful. In this post, we are going to answer these questions and tell you basic knowledge you should know about using iMessage on computer, including Mac and Windows. But there are some questions involved with using iMessage on computers, such as how to set up iMessage on Mac computers, is it possible to use iMessage on Windows PCs, how to save iMessages to computer, etc. Unlike traditional text message, iMessage is an instant message service, so it is not only available on iPhone and iPad, but also working on Mac.