I know that the defaults are inside the content folders inside the app’s.
I would like to know where to put my own styles and patterns on the Mac.
In preferences I can set folders about other items and parts, but not style’s.
Any idea, or documentation available?
You can open or create local collections right from the Styles window. Click on the right-pointing arrow to get the menu open.
Put them in a directory in Documents so that you can access them with the next version of SketchUp when you install it. Make sure to add your custom style library to your favorites., too. You can do the same for local components libraries, too.