Yes, that's what I mean. Do you know how to enable it on Mac? I see that if I set the tabs to be on the left or the right, I get a fake titlebar, but I haven'

Yes, that's what I mean. Do you know how to enable it on Mac? I see that if I set the tabs to be on the left or the right, I get a fake titlebar, but I haven't found an option to get a proper one that matches all the other applications.