Apple uses a unique format for its icons on macOS, and let’s just say it’s easier to convert and set up when your images are in PNG. Some of the popular icon repositories where you can download a variety of icons include, IconsDB, PNGTree, FlatIcon, Icons8, and more.Įnsure that you download your icon images in PNG format and store them in a distinct location on your Mac. Many web-based icon repositories offer free downloads while some may allow you to directly download icons in various formats, others might require you to sign up for a free account. Set custom app icons on macOS Big Sur Step 1: Collect custom icons for your apps in PNG formatīefore you change the default app icons, you need to collect the custom icons that you’ll use as replacement icons for your apps on macOS. 1.3 Step 3: Set custom icons for macOS apps.1.2 Step 2: Convert icons from PNG to ICNS.1.1 Step 1: Collect custom icons for your apps in PNG format.1 Set custom app icons on macOS Big Sur.
