I am unable to locate the XCode device support files for iOS 12.3. Usually, the device support files are contained in the latest XCode version. But I can't locate the files in XCode 10.2 > Contents > Developer > Platforms > iPhoneOS.platform.
Any help on this is very much appreciated.
You can create the "12.3" folder and copy the "12.2" files into it.
https://github.com/xushuduo/Xcode-iOS-Developer-Disk-Image/issues/7#issuecomment-480309987