Post the recent update to Xcode 12.x (12A7300), I found opening an app returned the following deployment error
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 14.0.99.
This error got me as I scanned through the settings for the deployment target being set to 8.0. However, I was unable to find anything that would have defined the setting to 8.0. Such as going to project > build settings > deployment
iOS Deployment target set iOS 13.2 with debug and release likewise set to 13.2
Instead, make the following change to the pod file by adding at the bottom
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
Perform a clean (shift+cmd K) and build (cmd B) and the error will be gone.
This error also occurred for me when the project I was working on eventually required CocoaPods to be added. The project had been kicking around for a couple of months before CocoaPods was needed. Anyway, once pods was added this error graced the project. Making the change noted above had the error vanish once again.