Many images and graphics, however, come in a PNG format — most notably screenshots. Luckily, with the Preview program that comes with your Mac computer you can convert a PNG to a JPEG.

If you’re looking for lossless PNG compression in a simple utility, PNG Compressor for the Mac is a utility designed for quickly dragging a folder or group of images into the icon or onto the window ...

But if you need to convert it to JPG, that's easy to do as well. You can save PNG files as JPGs in a number of common Mac apps, but the easiest is to use Preview. 1. Start Finder and then locate ...