iOS/tvOS playground fails with “Unable to find execution service for selected run destination”

Question

After migrating to XCode 7.1 I can not use playground with iOS and tvOS platforms. Only OS X works. Simplest playground code produces error message:

Una

Answer 1

I was able to resolve this issue with these two commands in the Terminal:

$ rm -rf ~/Library/Developer/CoreSimulator/Devices
$ killall -9 com.apple.CoreSimulator.CoreSimulatorService

Answer 2

Add all the simulators in xcode--> window-->devices.

and restart the xcode it will works fine

Answer 3

There may be a faster solution:

Check that you have iPad Pro simulator in your devices in Xcode. If not – add it via Add Simulator option.

As some have noted in comments, you may also need to restart Xcode or reopen the playground.

To add a simulator go to Devices (Window > Devices). Click the + button at the far bottom left of the window, click "Add Simulator", then select the appropriate "Device Type" from the dropdown and click "Create".

Answer 4

Ok, after some struggle, here's the solution.

1. Clean up the folder ~/Library/Developer/CoreSimulator
2. Restart the machine
3. Try running an iOS Playground, it should work without problems now.

Note: In my case I renamed CoreSimulator to CoreSimulator.old, and after restart a new CoreSimulator was auto-created (so, I just threw away the .old one).

BTW, there is a file ~/Library/Developer/CoreSimulator/Devices/device_set.plist with whole list of Simulators under /Root/DefaultDevices. I think this is where the problem was coming from.

Answer 5

Xcode 8 update. Ran into a similar message

"selected platform is not available"

With the playground open, in the upper right of the window, the last icon on the right: Hide or Show the Utilities. Click that, then in that area click the icon on the left: Show File Inspector.

Then in the Playground Settings popup it may be set for unknown. Change it to your Platform of choice (OS X for me) then you should be good to go.

Answer 6

Delete everything inside your DerivedData folder, ~/Library/Developer/Xcode/DerivedData, and then restart Xcode