Hi,
As of now, one cannot open a new RC window (to connect to two servers at once) on Mac without opening another instance of the application.
Most applications (such as FireFox) have this option readily available to open a new window if you right-click the app icon or navigate through the toolbar.
RC on the other hand? Not so fortunate.
One can get around this limitation by using the Terminal command of
open -n ~/"Library/Application Support/Graal/RC/RC.app", depending on where your RC app folder is located. This solution, however, looks odd, disorganized, and inefficient on my dock.
Is there any chance this will be added in the future?