3 Free and Open-source Image editor Apps for macOS (Intel and Apple Silicon)

1- APNGb

macOS app which assembles and disassembles animated png files

APNGb is a macOS app which creates animated png from a series of png frames and disassembles animated png into a series of png frames. Assembling has optimization and compression capabilities, option to change frame delay for all or selected frames, playback options. See Assembling feature and Disassembling feature sections for more details. App supports macOS 10.11 and above.

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2- GIMP (GNU Image Manipulation Program)

Open-source free Photo Editor and Photoshop Alternative

GIMP is a free and open-source raster graphics editor used for image manipulation and image editing, free-form drawing, transcoding between different image file formats, and more specialized tasks. It is not designed to be used for drawing, though some artists and creators have used it in this way.

Read about GIMP (GNU Image Manipulation Program) 's features, license, platforms, and more.

3- darktable

open source photography workflow application and raw developer

darktable is an open source photography workflow application and raw developer. A virtual lighttable and darkroom for photographers. It manages your digital negatives in a database, lets you view them through a zoomable lighttable and enables you to develop raw images and enhance them.

darktable is created for photographers, by photographers.

Having developers that are also avid photographers as part of the target audience is good for understanding the real world problems, challenges, and workflows.

Read about darktable 's features, license, platforms, and more.