Since the target group were designers, the presenter used a Mac, and tried to do everything using a GUI client for Git.
I don't remember which one he used, but it ran natively on the Mac and it looked quite nice.
(Still, the presenter sometimes struggled with that GUI. He was obviously more used to the command line.)
Most git actions don't need a deep understanding of Git nor a full GUI to function. I think git gui and gitx probably are enough to get a designer going.
Since the target group were designers, the presenter used a Mac, and tried to do everything using a GUI client for Git. I don't remember which one he used, but it ran natively on the Mac and it looked quite nice.
(Still, the presenter sometimes struggled with that GUI. He was obviously more used to the command line.)