Download of IPTCViewer 2.0 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The program is included in Design & Photo Tools. This Mac application is an intellectual property of Joakim Braun.
From the developer:
View image metadata in Indesign and create byline and caption text frames. These can be positioned at any image frame edge and formatted with paragraph styles, object styles and color swatches of your choice. IPTCViewer handles JPEG, TIFF, EPS/AI/PDF and native Photoshop files.
You may want to check out more Mac applications, such as Cuadro or Resize Now, which might be related to IPTCViewer.