Troubleshooting Common Issues - codepath/ios_guides GitHub Wiki
Common Errors
Seeing Could not find Developer Disk Image errors
This error appears when the connected device is running an iOS version newer than your installed Xcode supports — each Xcode release can only install and debug apps on the OS range listed in the Device Support column of Apple's Xcode system requirements table. The fix is to update to an Xcode version whose device-support range covers your device's iOS version. The Mac App Store carries only the current stable Xcode; older and beta releases are available at developer.apple.com/download/all. See Upgrading Xcode versions for how to install multiple Xcode versions side by side.