Hey everyone,
I am facing issue with Xcode & it is driving me crazy. I want insight. I am trying to test my app on the iOS Simulator but for some reason; it either takes forever to launch or just gets stuck on a black screen. Sometimes it works after restarting Xcode, but that is not a real solution. Also I have tried Cleaning the build folder , Resetting the simulator, Restarting my Mac, Reinstalling Xcode.
I am using the latest Xcode version on macOS. Could this be a compatibility issue; or is there something obvious I am missing?
Also, I started a Python course so if there is any way to debug this issue using Python scripts or automation.
Thank you… 
Hello, sorry but this is a french speaking forum so we won’t be able to help you in english.
Have a great day!
It sounds incredibly frustrating to deal with these simulator issues. Here are a few thoughts and suggestions (from chat GPT)
- Simulator & Xcode Compatibility
OS Version Check: Double-check that your macOS version is fully supported by your latest Xcode release. Sometimes even minor mismatches can cause simulator glitches.
Known Issues: Look for any recent reports or Apple Developer Forum posts regarding black screens or long launch times with your specific Xcode version.
- Cleaning and Resetting Steps
Derived Data: Beyond cleaning the build folder, try deleting the entire Derived Data folder (typically found at ~/Library/Developer/Xcode/DerivedData). This can sometimes clear out hidden build artifacts causing issues.
Simulator Reset Options: Although you’ve already reset the simulator, consider using the “Erase All Content and Settings” option from the Simulator’s menu to ensure a complete reset.
- Investigating Logs
Console Logs: Use the macOS Console app or Xcode’s own logging to check for error messages when the simulator hangs. These logs might provide clues—perhaps a resource or permission issue.
Verbose Mode: Try launching the simulator in verbose mode from the terminal to see if more detailed error messages are available.
- Debugging with Python
While Xcode doesn’t offer direct Python integration for debugging, you can automate several tasks using Python scripts:
Using xcrun simctl:
The simctl command-line tool allows you to manage simulators. For example, you can script a reset using Python’s subprocess module:
python
Copier
import subprocess
subprocess.run([« xcrun », « simctl », « erase », « all »])
Automation Tools:
Tools like Appium, which are often scripted in Python, can help automate UI tests. This could indirectly help in diagnosing if a particular UI interaction or app state is triggering the black screen.
5. Other Workarounds
Switch Device Configurations: Sometimes using a different simulator device (or even a different iOS version) can bypass the issue temporarily.
Reinstall Command Line Tools: Consider reinstalling Xcode’s command line tools, as they sometimes become misconfigured after system updates.
Regarding Xcode and Simulator, you might be interested in the post I just created: Résolution des erreurs de sandboxing Xcode en développement Flutter