IDE: Xcode10
OS: 10.13.6
A compiler error
Showing Recent Messages Build system information error: unable to find sdk 'iphoneos11.2' (in target 'xxx')
The project built on Xcode 9.4 / OS 10.13.4. Only after updating did the project build start failing.
Click on your target
Click Build Settings
Under the Base SDK row, change the value to iOS (or whatever platform you are building for).