Invalid Toolchain while Uploading Xamarin.iOS app to App Store Connect

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Created Sep ’20

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I developed an app using Xamarin Forms and visual studio on macbook. When I tried to upload the app to App Store Connect, I get an error saying "Invalid toolchain. Your app was built with an unsupported SDK or version of Xcode. If you plan to submit this build to the App Store, make sure you are using the versions listed in "https://help.apple.com/xcode/mac/current/#/devf16aefe3b or later". I have tried to publish by using the latest xcode versions such as - Xcode 11.7, Xcode 12 beta 6 and Xcode 12 GM seed. But I am still getting the same error. I have to publish this app as soon as possible, I hope you guys can help me figuring out the issue here. Thank you very much in advance!

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Answer 1

KMT OP

Sep ’20

Xcode 11.7, Xcode 12 beta 6 and Xcode 12 GM seed.

Devs should never use any beta OS/SDK/tool for submittal to the store, ever, so b6 is out.

12 GM might fail right now if the backend hasn't been changed to accept it, and that is a distinct possibility, at least for the moment.

Xcode 11.7 should work regardless.

My guess is this isn't just about Xcode, but that you've also included a beta SDK, and/or built while on a beta macOS.

As well, once an project has been touched by a beta Xcode, there may be traces left if you switch to a release Xcode, such as 11.7, where the store sniffs out those traces and rejects as above. Be sure when moving to release tools to 'clean-build-folder' on the project.

I have to publish this app as soon as possible

I assume you're targeting iOS 14.x (except that Xcode 11.x would not know about it...) - you might stick with iOS 14 GM, and Xcode 12 GM, but again, it is common that the last part of the puzzle is resetting the flag on the backend that says those versions are ok. It might mean waiting thru the day, or even into tomorrow, if we're lucky.

developed an app using Xamarin Forms and visual studio

Pls. note that my reply is not an offer to troubleshoot 3rd party tools.

Good luck.

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Answer 2

FTSankalp OP

Sep ’20

I really appreciate your response KMT. Thank you!

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Answer 3

trucifer OP

Oct ’20

I have the same problem. I was able publish visual studio IOS app with no problems. I installed a visual studio update the other day and all of a sudden i got a compatibility error that required me to update to the newest version of xcode. I downloaded the new version of xcode and Now when i try and publish my app i get the invalid toolchain error that you got... Did you fix your issue?

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