Answers for "The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.5.99."

The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.4.99. (in target 'gRPC-C++' from project 'Pods')

# Instead of specifying a deployment target in pod post install, you can 
# delete the pod deployment target, which causes the deployment target to be
# inherited from the podfile platform. In Xcode, navigate to Pods > Podfile and 
# add the code below:

platform :ios, '12.0'

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings.delete 'IPHONEOS_DEPLOYMENT_TARGET'
    end
  end
end

The iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.2.99. (in target 'Flutter' from project 'Pods'

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings.delete 'IPHONEOS_DEPLOYMENT_TARGET'
    end
  end
end

react native the iOS Simulator deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.5.99.

Just Manually Update Development target in xcode Pods file.

The problem is in your pod files deployment target iOS Version not in your project deployment target iOS Version, so you need to change the deployment iOS version for your pods as well to anything higher than 8.0 to do so open your project workspace and do this:

Click on pods.
Select each project and target and click on build settings.
Under Deployment section change the iOS Deployment Target version to anything more than 8.0 (better to try the same project version).
Repeat this for every other project in your pods then run the app.

warning: The iOS deployment target 'IPHONEOS_DEPLOYMENT_TARGET' is set to 8.0, but the range of supported deployment target versions is 9.0 to 14.2.99. (in target 'GoogleSignIn' from project 'Pods')

Code Block post_install do |installer| installer.pods_project.targets.each do |target|  target.build_configurations.each do |config|   config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '9.0'  end endend