How do I install two versions of Xcode on the same machine -- Xcode 8 and Xcode 9?
How to install Xcode 8 and Xcode 9 on the same machine?
You can installXCode 9.1 Beta (that's what I did) by copying the beta in the application folder.
Take care not to open both XCode simultaneously.
And to always know which version you are using !
I really need to be able to use 8. There are old samples that won't run on 9. Is it not possible to have 8 and 9 installed on the same machine?