Xcode Simulator on my MacBook Pro has always worked fine until today, when upon opening it, it shows a black screen for any device selected. Pressing the device's power button does nothing. Restarting the device from the Simulator menu bar does nothing. Resetting the device does nothing. I have Xcode 12.5 installed and macOS Big Sur 11.2. Does anybody know what is happening?


I restarted Simulator several times and after a lengthy wait it is now on.

  • Could we please close this question? Simulator is working now. Jun 18, 2021 at 3:05
  • how did you solve the problem ? I have same issue
    – Onur
    May 29, 2022 at 10:05
  • Update your computer and Xcode. Restart simulator a few times. Try closing background applications and CPU-heavy tasks - lack of RAM and CPU will cause Simulator to be slow and sometimes black screen. Oh, and also get a new Mac if you're still running an Intel processor. Jun 8, 2022 at 21:40
  • You can delete the question yourself. But I will post an answer from your comment here to help others looking for a solution.
    – Thinkr
    May 20, 2023 at 9:03

1 Answer 1


As per the Ask Different Meta post Answer from someone's comment, I am posting this answer from a comment from the OP. Every content of this answer is from the comment.

What made it work :

  • Update your computer and Xcode.
  • Restart simulator a few times.
  • Close background applications and CPU-consuming tasks (lack of RAM and CPU causes the simulator to slow down and sometimes display a black screen, as explained in the question).
  • If you're still running an Intel-based Mac, buy a new one.

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