Mavericks Messages: Changing your photo You can send iMessages from Mavericks, which is great, but I was getting fed up of having a shadow person as my profile picture. To change this just click on the Messages menu, next to the Apple icon in the menu bar. Share:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Pocket (Opens in new window)