Can I ask a for a recommendation for an app. I am looking for a user friendly app that I can use to make, resize, and save in jpeg and png format, icon size art. Being new to Apple I have no idea. Free would be good too. Many thanks.
Just get GIMP! It's LGPLv3+ und GPLv3+ licensed.
GIMP is a multi-platform photo manipulation tool. GIMP is an acronym for GNU Image Manipulation Program. The GIMP is suitable for a variety of image manipulation tasks, including photo retouching, image composition, and image construction.
GIMP has many capabilities. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, an image format converter, etc.
GIMP is expandable and extensible. It is designed to be augmented with plug-ins and extensions to do just about anything. The advanced scripting interface allows everything from the simplest task to the most complex image manipulation procedures to be easily scripted.