1. Launch the Photos app on your Mac.
2. Double-click the photo you want to edit. You HAVE to double-click the photo to access the editor (Stupid, I know). (If the image is not in Photos, choose File — Import and choose the image.)
3. Click the Edit Photo icon:
4. Click “Red eye”
5.Adjust the size of the circle with the slider to match the red eye. Make sure the circle is the same size as the red circles, then align the circle over the red portion of the eye and click to fix.
6. Click Done on the top right of the Photos window.
The kid looks a lot better, eh?