BatchImageWatermark 5.6.2 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software is categorized as Design & Photo Tools. The actual developer of this free software for Mac is Arwer Software. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
Batch Image Watermark makes it easy to design multiple watermarks, live previews, WYSIWYG, and quickly watermark large numbers of images, greatly improving your productivity. Moreover, the app can also resize the image in batches, batch convert image file types, batch modify image DPI, batch add/modify image metadata information, batch rename files name, set image color depth and grayscale in batches.
You may want to check out more Mac applications, such as Vectorworks 2010 Viewer, Polaris or Send Photo Pro by ZoomFoot, which might be related to BatchImageWatermark.