Catch bugs as soon as they happen and know exactly why a crash occurred. With Instabug you will automatically receive device data, network logs, and reproduction steps with every bug and crash report. It only takes a line of code to integrate.
Just plain implementation of tabbed windows, single window app, storyboard, using newWindowForTab: you can drag horizontally tabs to move position and vertically to detach this is provided for free. cmd+t = new tab or just click + in window menu there are provided few options too.