Xcode 9 Bug: Cannot find cdtool ...

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

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jhowlin
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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 /

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jhowlin
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Hello, I experience exactly the same problem.


/<***>xcdatamodeld/version 1.1.xcdatamodel: 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:0x7f84a1a0afd0:'com.apple.platform.iphonesimulator':<DVTFilePath:0x7f84a1a0ae60:'/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform'>>.


I have XCode 9 installed and the error is in XCode 8 (everything's working fine in XCode 9).


But the problem only manifested after I tried to archive a build in XCode 8. Before that the simulator worked fine.

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thedeck
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Apps ran side by side ok at first. The only thing I did that may have caused a problem is added the 10.3 simulator to Xcode 9. Could have nothing to do with it.


IVe looked through all the Library/Developer directories to find anything that may be persisting between installs and just can't find anything!

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jhowlin
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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 /

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jhowlin
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Thanks SO MUCH ! It WORKED !!

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thedeck
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I had the same problem and this fix made my day! 🙂

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imhenke
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Thank you so much.

It worked.

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yoovrajshinde
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Thanks! Trying to get some better formatting of the commands for easier copy/pasting.

sudo mkdir /Library/Developer/CoreSimulator/Profiles/Runtimes/Backup
sudo mv "/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 10.3.simruntime" "/Library/Developer/CoreSimulator/Profiles/Runtimes/Backup/"
sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService
Posted by
grumpy old man
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thanks a lot! it worked to me in xcode 8.3.2

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ideveloper1990
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