How to change the MacOS Screenshot File Format to JPG or another format.
Change Screenshot Format
MacOS is a great system, built on great hardware. But with that hardware comes high-resolution Retina Displays, which is normally a good thing.
However if you’re taking a lot of screenshots on MacOS, you’ll find the default file format is PNG. Although PNG is excellent for retaining image quality, but has a high file size. To reduce the file size, you can change the file format.