After installing Xcode 9 beta, Xcode 8 gives me an error when compiling a project:
Cannot find cdtool at '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Xcode/Agents/cdtool': Cannot find a simulator runtime for platform <DVTPlatform:0x7fd67af0a930:'com.apple.platform.iphonesimulator':<DVTFilePath:0x7fd67af0a7c0:'/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform'>>.
I suspect Xcode 9 modified some shared state with Xcode 8 (set a path, overwrote a file, etc.). But I've tried deleting and both Xcodes to no avail.
The project uses Core Data and it's clearly failing when trying to compile the xcdatamodel.
I can still compile and run under Xcode 9.
Pretty stuck here, so would appreciate any help!!
Jason
Apple engineer reached out on this... Those of you with cdtool errors in Xcode 8, I suspect you installed the iOS 10.3 Simulator runtime from Xcode 9. It was discovered this week that this causes a problem with cdtool in Xcode 8.3. You can work around that by moving iOS 10.3.simruntime aside and restarting CoreSimulatorService: sudo mkdir /Library/Developer/CoreSimulator/Profiles/Runtimes/Backup sudo mv /Library/Developer/CoreSimulator/Profiles/Runtimes/{,Backup/}iOS 10.3.simruntime sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService Then restart Xcode, Simulator, etc. Those of you that deleted CoreSimulator.framework and thus cannot run Xcode.app any more can reinstall CoreSimulator.framework with: installer -pkg /Applications/Xcode-beta.app/Contents/Resources/Packages/XcodeSystemResources.pkg -target /