Somebody else has to help with where models are stored, I have no idea about locations on a Mac.

Use one of the following methods when you have the location where the obj/mtl and zip files of the models are stored:

1. You can select multiple obj and zip model files and drag&drop them into your 2D pane. They will show the import dialog one after the other without having to select <Import> from the menu. That still requires four times the <Enter> key for each model to import.

2. Create a new furniture library with the Furniture Library Editor. Use the same method of dragging&dropping multiple selected models into the editor, they will all import without the need of four times <Enter>. A much faster method! You will have to edit the models that are doors, windows, or staircase to check the appropriate properties. Then import the library in Sweet Home 3D.