There are several alternative raster graphics editors available for macOS, including:
* Apple Photos: Photos is the default photo management and editing application for macOS. It includes a variety of basic editing features, such as cropping, rotating, and adjusting lighting and color.
* GIMP: GIMP is a free and open-source raster graphics editor that is available for macOS. It includes a wide range of advanced editing features, such as layers, masks, and plugins.
* Pixelmator Pro: Pixelmator Pro is a paid raster graphics editor that is available for macOS. It includes a variety of features for creating and editing images, such as layers, masks, and vector graphics.
These are just a few of the many raster graphics editors that are available for macOS. You can find more information about these and other editors on the App Store or by searching online.