Everything started with the message ‘You can not install with Current Xcode’ while validating and distributing the app from Xcode.

https://developer.apple.com/news/upcoming-requirements/?id=04292024a

The unfortunate part is that I tried on the 29th; if I had tried a day earlier, I wouldn’t have had to deal with this…

I updated Xcode to 15 (which also required updating my MacOS to Sonoma – we made two changes at the same time, as you can understand), and I’ve tried every solution imaginable for the past 3 days. I can’t remember ever struggling this much with a problem before. I’ve tried over 20 solutions, and consistently, I’m getting errors like:

‘SDK does not contain ‘libarclite’ at the path’

or

Lexical or Preprocessor Issue (Xcode): ‘Flutter/Flutter.h’ file not found(LAST ERROR)

Podfile:(Final, I changed it more than 10 times, always encountered with a problem)

# Uncomment this line to define a global platform for your project
platform :ios, '12.0'

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release,
}

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
  end

  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT=(.*)/)
    return matches[1].strip if matches
  end
  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

target 'Runner' do
  use_frameworks!
  use_modular_headers!

  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings["IPHONEOS_DEPLOYMENT_TARGET"] = "11.0"
    end
  end
end

How can I solve my problem?

It seems like developing iOS apps with Flutter using Xcode 15 might become a thing of the past.