MacMost: Acorn

Creating Circular Text On Your Mac With Acorn
If you need to draw text along a circular path on your Mac, you'll find you need a third-party app to do it. One general image editing app that will do it is Acorn, available in the Mac App Store at a much lower cost than anything from Adobe. You can easily add text outside or inside of a circle, and make adjustments to the text afterward. You can then export the result to use in any app.