Eltima has PhotoBulk: Watermark, Resize, Optimize and Rename for Mac in the Mac App Store for 99-cents (regularly $7.99) for a limited time.

PhotoBulk is easy-to-use bulk image editor that lets you add text/image watermark, resize, and optimize hundreds and thousands of images or photos in just one click.

You can also Rename multiple pictures and Convert to the most popular formats in no time.

Just drag and drop your images onto the app, choose desired actions and press “Start”. Voila!

Bulk watermark lets you easily and quickly watermark multiple photos, using the great variety of options. Customize your photos with tags, logos or any other personal marks. Place watermark anywhere with the precise per-pixel controller, then switch to the angle mode and rotate it to that very angle you want and check the result immediately in real-time preview window!