Failing to add pod file to Xcode 13 project

Question

I am trying to add a pod file to my project but I consistently get this error in the terminal. Does anyone know how to fix this? Or is it because I already use Xcode 13 with iOS 15 beta? My Project is called AdMob testing because I wanted to use Cocoapods for Admob in case you wondered. Thanks.

myName@MacBook AdMob testing % pod init

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Command

/usr/local/bin/pod init

Report

• What did you do?

• What did you expect to happen?

• What happened instead?

Stack

   CocoaPods : 1.10.1
        Ruby : ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin20]
    RubyGems : 3.0.3
        Host : macOS 11.5 (20G5023d)
       Xcode : 12.5 (12E262)
         Git : git version 2.30.1 (Apple Git-130)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib
Repositories : trunk - CDN - https://cdn.cocoapods.org/

Plugins

cocoapods-deintegrate : 1.0.4
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.0
cocoapods-trunk       : 1.5.0
cocoapods-try         : 1.2.0

Error

RuntimeError - [Xcodeproj] Unknown object version.
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.19.0/lib/xcodeproj/project.rb:227:in `initialize_from_file'
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.19.0/lib/xcodeproj/project.rb:112:in `open'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.1/lib/cocoapods/command/init.rb:41:in `validate!'
/Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:333:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.1/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.1/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'

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[!] Oh no, an error occurred.

Search for existing GitHub issues similar to yours: https://github.com/CocoaPods/CocoaPods/search?q=%5BXcodeproj%5D+Unknown+object+version.&type=Issues

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This is the full error. Thanks for ideas.

Answer 1

Change the project to Xcode 12.0 compatible. Thanks to https://github.com/CocoaPods/CocoaPods/issues/10713#issuecomment-865145924

Answer 2

Don't forget after changing Project Format you also need to update the xcodeproj with:

sudo gem update xcodeproj

Answer 3

Run the following commands in terminal:

1. sudo gem update xcodeproj
2. sudo arch -x86_64 gem install ffi
3. arch -x86_64 pod install

It works for me!