To get started, head to the folder of photos you want to convert in the Finder. Select all the photos you want to convert—you ...

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 ...

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.

One of the most common: taking the PNG image file format and turning it into ... You can save PNG files as JPGs in a number of common Mac apps, but the easiest is to use Preview.