Orion Markup Express
You can download Orion Markup Express 2.10 for Mac from our software library for free. The software is included in Design & Photo Tools. This free Mac app was originally produced by Aidaluu Inc. Our built-in antivirus checked this Mac download and rated it as virus free.
From the developer:
Orion Markup Express makes it easy to add notes and annotations to photos and screenshots. Featuring photo magnification bubbles, it creates magnified versions of selected image areas (zoom regions). In addition, it provides multiple-sized outline boxes and text labels, as well as lines and arrows of various patterns and thickness.
You may want to check out more Mac applications, such as Orion Markup, Express DigiBooks or Myths of Orion: Light from the North, which might be similar to Orion Markup Express.