Batch process, convert, watermark, rename, and adjust numerous photos. Group, search, preview, rate and label your files according to personal specifications. Share the image via Flickr, Facebook or Airdrop. Work with formats such as BMP, JPEG, GIF, PDF, PNG, JPEG 2000, and TIFF.
The 2.7 version of PhotoMill for Mac was available as a free download on our website. The application lies within Design & Photo Tools, more precisely Converters. This software for Mac OS X was originally developed by Overmacs Team.
From the developer:
PhotoMill helps you batch convert photos to popular image formats, rename by a pattern, add text and image watermarks, adjust colors, fit geometry, edit metadata, and more.
PhotoMill reads all the popular image formats and converts to: BMP, GIF, HEIC, JPEG, JPEG 2000, PNG, TIFF. You control settings for each format.
32-bits support allows you to retain image colors rich and vibrant, and make advanced color adjustments.
You may want to check out more Mac applications, such as Warranty Hero, dcm2niigui or FolderIconCreator, which might be similar to PhotoMill.