Xcode 16.3 not working on MacOS 15.4.1

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Created Apr ’25

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I just updated macOS to 15.4.1 and downloaded the latest version Xcode (16.3), and the simulator is not loading at all? Is this a common issue between Xcode 16.3 and macOS 15.4.1 or is it just me? I tried all the fixes I found online and it is just no working for me. Can someone please help me? Thanks!

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Answer 1

drewolbrich OP

Apr ’25

I also installed 15.4.1 and Xcode 16.3 appears to work for me.

I was able to run an app in the iOS 18.4 and iOS 17.5 simulators.

Sorry that's not helpful.

Does the simulator actually not load at all, or does your app not launch in the simulator, or does your app launch, but crash?

Are you low on disk space?

I'm sure you've tried all these, but off the top of my head:

Try rebooting
Try other simulator iOS versions
In Xcode > Settings > Components try deleting the iOS simulator you're using (with right-click > Remove) and then reinstalling that simulator
Delete everything in the Derived Data folder and rebuild

Are you low on disk space?

What have you tried already?

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Answer 2

jarvis_210 OP

Apr ’25

Accepted Answer

I have solved the problem. I tried all the methods drewolbrich mentioned and they were not working for me. Eventually it was working after I use “xcrun simctl shutdown all” to basically reboot all the simulators. I am not sure if this is what helped.

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