Error running playground. Unable to find suitable

问题:

I created a new project in XCode.

File > New > Playground (option+shift+cmd+N)

I restarted my XCode and also rebooted my system, but still same error.

回答1:

Try navigating to the Xcode Menu Window >> devices (shift+cmd+2) a new window will pop up.

On the bottom left, add a new simulator, specifically one running on iOS 8.0 to the existing list.

Restart Xcode.

回答2:

From the developer forums, this worked for me:

1. Quit Xcode
2. Delete the folder /Users/<username>/Library/Developer/CoreSimulator/Devices. For example, in Terminal: rm -rf ~/Library/Developer/CoreSimulator/Devices
3. In Terminal: killall -9 com.apple.CoreSimulator.CoreSimulatorService (or just reboot).

回答3:

Fox Xcode 7, I had to install iPad Air or iPad Air 2 for the playground to work.

回答4:

As referred by @Mayank Gupta , It worked on adding new simulator and restarting the XCode.