Step 1
I downloaded the Xcode 8.3 old version and defined it and Toolchains menu option as well but before, I run a fell commands on console:
Define the Xcode version:
~$ sudo xcode-select --switch /Applications/Xcode\ 8.3.app
And now you can prove the Swift configurated:
$ swift -version
Apple Swift version 3.0 (swift-3.0-RELEASE)
Target: x86_64-apple-macosx10.9
I run pod clean
and pod install
and it's ok.
The step two of the problem is on No such module PopupDialog on Swift3