Esiste un modo per rendere le cartelle aperte in una nuova finestra per impostazione predefinita in OS X El Capitan?

Set folders to open in tabs or windows

1. In the Finder, choose Finder > Preferences, then click General.
2. Select or deselect “Open folders in tabs instead of new windows.”

Open folders in tabs or windows

Press the Command (⌘) key while you double-click the folder.

The folder opens in a new tab or window, depending on your Finder preferences. Tip: If the Finder toolbar and sidebar are hidden, double-clicking a folder without pressing the Command key opens the folder in a new window.

To open a new Finder window without opening a specific folder, choose File > New Finder Window or press Command (⌘)–N.

Informazioni da: OS X Yosemite: apri le cartelle nelle nuove schede o finestre del Finder

Quindi immagino che la risposta sia "no" allora.