Xcode 9 iOS Simulator becoming black screen after installing Xcode 10 beta

Question

I know that so many people have asked this question earlier. But I think my situation is different. In my case Xcode 9.2 was already installed and I upgraded macOS from 10.1

Answer 1

This is just for the users that failed trying everything to save Xcode 10 and then reinstalled Xcode 9.4.1 and the simulator still not working.

Here is what I did to give Xcode 9.4.1 back running. After I got this problem after upgraded to Xcode 10. I tried that famous FramebufferRendererHint, didn't work for me. I have found out the Xcode 10.1 beta release didn't fix the problem for someone else, so I didn't bother to try 10.1 beta.

From the online research I know the problem is in /Library/Developer/PrivateFrameworks/CoreSimulator.framework. Without Xcode even installed on your Mac /Library/Developer doesn't exist. So it is installed by Xcode when your first time run Xcode. You would notice a screen showing "Installing Components" But after you installed Xcode 10 and then install/run Xcode 9.4.1 it won't touch that folder anymore. So problem stays even you put Xcode 9.4.1 back

That's why after I downloaded Xcode 9.4.1 expanded and ran it. Problem still there.

I didn't backup my Mac. So I decided to start from scratch. Restored my MacBook from Internet, downloaded Xcode 9.4.1 again. and now everything is back to normal. I can keep releasing the App to App Store now.