PhotoBulk is photo editor for Mac that allows you perform different types of batch editing: add watermark to photos, resize, convert and rename images as well as optimize pictures.
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An image editing software for Mac
PhotoBulk is an image editor Mac app that is meant to dramatically simplify batch image editing: batch rename images on Mac, optimize photo, compress image file, add watermark. Additionally to already mentioned, PhotoBulk is also a perfect PNG to JPG converter for Mac and bulk image resizer Mac app.