Aconvert.com is a nice free online tool to batch convert AI to PNG and multiple other formats. Some of the output supported by this web service include JPG, PNG, BMP GIF, ICO, PSD, SVG ...

Customizing the icons of your folders on macOS is surprisingly easy, and it's a great way to make it easier to find a particular folder at a glance. Here's how to do it, step by step.