Can't submit apps to AppStore: ERROR ITMS-90534: "Invalid Toolchain

Question

ERROR ITMS-90534: \"Invalid Toolchain.

New apps and app updates must be built with the public (GM) versions of Xcode 6 or later, macOS,

Answer 1

From Xcode -> Go to Organizer -> Under Archives, select the build and right click to Show in finder -> Select the Project and right click to -> Show Package Contents -> Double click on Info.plist and add a row. The key is BuildMachineOSBuild and the Type is String and the Value is 16G29 (Value is based on your Mac OS Version. Please follow the below given link)

https://support.apple.com/en-in/HT201260 .....Check the version number for your Mac OS version and set the value in the Info.plist

For example if your Mac OS version is 10.12.6 then add this to your plist

BuildMachineOSBuild
16G29

You are ready to send your build to iTunes Connect