Please see this link for up-to-date system requirements. The extension is a component of Affinity Photo itself so requires Affinity Photo to be installed.

The Affinity Photo architecture and a powerful suite of retouch tools have been brought together to create a photo retouching solution integrated within Apple Photos as an extension. Why not review the product's key features in more detail? Apple Photos application and Affinity Retouching Affinity Photo is also available on Ipad which allow users to be able to editing their photos easily on the go.

Interworking with other Affinity products.

Liquify tools for retouch or crazy effects.

Retouching heaven with all the industry standard tools you'll ever need.

Non-destructive Adjustment Layers and live filters.

End-to-end CMYK, RGB, LAB, and grayscale pro color spaces.

Develop Persona-a dedicated studio for camera RAW processing.

Different tool sets (Personas) for different design needs-Photo, Liquify, Develop (RAW), HDR and Export.

Built from the ground up to live in the Cloud-connected App store world.

Stunning performance with instant redraw.

It was Serif's second macOS app after Affinity Designer and, like that app, was built from the ground up to leverage core native technologies, including Grand Central Dispatch, Core Graphics, OpenGL 14 and Metal 2 15 hardware acceleration. Here's an overview of what you can expect. Affinity Photo began as a raster graphics editor solely for macOS.

Affinity photo editing