iOS app submission yields "invalid toolchain" although Xcode is up-to-date [duplicate]

Question

I have submitted my app to the app store using Xcode 6.4 on OS X 10.11, the app was pre-approved for testing. I then iterated through 5 builds all of which were uploaded successfully and installed on multiple test devices. Now that I am trying to submit for the final approval, I am getting:

"Invalid Toolchain. New apps and app updates must be built with the public (GM) versions of Xcode 6 or later, and iOS 8 SDK or later. Don't submit apps built with beta software. "

How can this be given that I am using Xcode 6.4, the app is set to run on iOS 8 or greater, and all of my previous builds, including the current, have been just fine getting into the test program and being installed?

Does anyone know how I could rectify this situation to get my app into the final step?

Answer 1

OS X 10.11 El Capitan is a beta software you cannot use it to build and submit iOS App to the store.

There is a dirty way to manage it but I personally would not do it https://stackoverflow.com/a/32233429/3979236