I passed an old project that is in switf version 2. *, I just installed the Xcode9 but I got a notice that told me that only supports versions of 3. * and open it with Xcode 8 but I can not find the Xcode 8 only Xcode 9, and when I opened the project and executed it I get the following error
that library has already been installed with the project
I hope your help thanks