问题
I want to run my app on both simulators ios6 and ios7. I'm trying to install ios 6 simulator but I am getting this error:
Failed to install "iOS 6.1 Simulator"
An unknown error occured. Please try again later.
I restarted XCode but not working stil..
回答1:
Try to reset iOS 6.1 simulator from menu "iOS Simulator -> Reset Content and Settings...",
then run your app in XCode. This helped me.
回答2:
Was having the same problem ,
already did a system restart and reset the simulator but didn't work
but
deleting the app manually inside the simulator worked for me,
回答3:
Run it in iOS 7 simulator (so you can run it), once there, go to "Hardware > Device > select some iOS 6 or earlier device", then apply the "iOS Simulator -> Reset Content and Settings..."
回答4:
I got exact same problem and solved by using following way,
Launch the iOS Simulator
Go and click "iOS Simulator" Menu
Click "Reset content and settings"
Close simulator and rebuild your app.
Above screen shot is showing the way how you can do this...
I think this works for you...!!!
回答5:
I had this issue after update to XCode 5. Running an application on the available iOS 7 Simulator and setting the "Enable this mac for developing" check in the popup has solved the problem.
回答6:
If you use XIB or Storyboard. You have to set document type to "XCode 4.6"
choose storyboard -> inspector (right pane) -> first tab (identity and type)
回答7:
I had the exact the same issue. I restart my Mac and I'm now download it.
EDIT: I tried everything else. I'm sorry not to be able to answer by given a more useful option.
来源：https://stackoverflow.com/questions/17984150/failed-to-install-ios-6-1-simulator-xcode-5