To print your image, choose File > Print… from the menu bar, or press Command + P.
The Print dialog will appear with a preview of your document. Adjust your printing options as needed, then click Print.
For more information on printing, see Print documents from your Mac on Apple Support.
To scale the image to fit your paper, see Reduce or enlarge pages and images to fit on a page.
Tips
Make sure to select your macOS version at the top of the Apple Support pages for accurate instructions.