this might be an absolute stupid question, but I'm new to AE and MacOS.
I have no preferences. It's not under edit and it won't open with the short cut. I don't even have an AE preference folder on my Mac. Do I need to create it?
Preferences for all Mac apps are always found under the app name in the top left corner of the screen. They are always the second line item under the divider. That is the OSX standard and has been for as long as I can remember.
You find preferences on a Mac for any app by clicking on the app name to the right of the apple. You can also always use the keyboard shortcut Alt/Option + Ctrl/Cmnd + ;