It is used as SSH Client to connect to Your Linux server or for some other purpose.

Keyboard Events When the user types, where are the corresponding events sent? First, the window manager gets the event and forwards it to the active application. The active application forwards the keyboard events to the key window. The key window forwards the event to the “active” view.

Best Chiclet Style Keyboard – Logitech Craft. So this is a new developer keyboard from Logitech and is designed for programmers and designers. At least on a Mac, the location of “Alt” (called “Command”) makes sense - it’s the modifier for keyboard shortcuts. On Windows, it’s “Control”, and requires pinky contortions (which might be why a lot of developers map Caps Lock to Control).

Which view, then, is the active one? Each window has an outlet called firstResponder that points to one view of that window.

That view is the “active” one for that window. For example, when you click on a text field, it becomes the firstResponder of that window ().

The First Responder of the Key Window Is “Active”.