Cocoapods error

error: Unable to find a specification for xxxxxx

solution: Execute sudo rm -fr ~/.cocoapods/repos/master because it'll remove all the bogus and corrupted repos that you have in your computer to give it a chance to repopulate after you redo pod setup, which'll reinstate you with a fresh Cocoapods setup. Additionally, you'll want to specify sudo xcode-select --switch /applications/Xcode.app where your new version of Xcode is. That was just another setup procedure that I had to do to complete the fix. From there, just do pod setup and you're set to run  pod install to integrate all the libraries that you want!