I am using XCode 6.4 version. I cannot find how to add the existing project (I created it previously) to the source control, i. e. git control. I found there are answers related to the options to do it while you create a new project (there is a ticker) or recommendations to do it via Terminal. However, how to do it without terminal?
The only option of "Checkout..." is possible ("Source Control --> Checkout..."), other option in the menu of "Source Control" are grey out. It is illustrated by the picture below:
I found the way to do it with XCode 7 here but it is not possible to use it for XCode 6.4.