Here’s a simple way to save an image using Mac’s Preview.
- All you have to do is copy an image, open up Preview,
- Choose "New Image from Clipboard" in the File menu.
- The image in your clipboard will then show up like any image you've opened in Preview, giving you all the options you have with standard image files.
- You can edit it as you like, then save it out to one of many format options, or email it.