Select any app and press Command-I to open an Info pane. Now drag-and-drop the new app icon into the top-left corner of the Info pane. This will replace the app icon for you. This method is fast ...
For instance, as soon as I hopped on the beta for macOS Sonoma, I wanted to add Twitch to my Dock as a web app. However, the icon Safari currently suggests for Twitch is their old logo, which I don’t ...