can not create iOS 27 Simulator

I'm having a similar issue. The weird part is that the app is clearly running, I can see the logs on Xcode, but the device hub doesn't show any iOS 27 simulator.

@b.n.ch @jpires Can you check the following:

1. Open Xcode 27 > Settings > Components
2. See if iOS 27.0 beta is installed.
3. If it is not installed you can tap on the Get button to get it.

Thank you for the post, are now the simulators downloaded? Have you followed the recommendation to download those using Xcode?

Do you have more than one Xcode installed? It is highly likely that either the system is still pointing to the older Xcode version, or the Simulator Runtime itself hasn't been fully registered by CoreSimulator.

Device Hub uses the active Xcode path to determine which simulators are available. Even if you installed the Command Line Tools for Xcode 27, the system might still be pointing to your stable Xcode 26.5 installation.

Open Terminal and check your current path with, I think is that command.

xcode-select -p

Can you provide me what do you see when you go to the Xcode simulator list? I believe a developer already provided this suggestion?

1. Open Xcode 27 Beta.
2. Go to Xcode > Settings > Platforms.
3. Ensure that iOS 27.0 Simulator is listed and fully downloaded. If there is a "Get" button next to it, it hasn't been downloaded yet.

Look for iOS 27.0 in the output, it will usually give you a reason why (e.g., missing dependencies or incompatible macOS version)?

If you go through these steps and xcrun simctl list runtimes what does it show?

Looking forward to get your answers so we can figure it out. Many developers here will be able to help with more suggestions.

Albert  WWDR

I do have old Xcode 26 installed still.

xcode-select -p

/Applications/Xcode-beta.app/Contents/Developer

xcrun simctl list runtimes

== Runtimes == iOS 18.5 (18.5 - 22F77) - com.apple.CoreSimulator.SimRuntime.iOS-18-5 iOS 26.2 (26.2 - 23C54) - com.apple.CoreSimulator.SimRuntime.iOS-26-2 iOS 26.4 (26.4.1 - 23E254a) - com.apple.CoreSimulator.SimRuntime.iOS-26-4 watchOS 11.5 (11.5 - 22T572) - com.apple.CoreSimulator.SimRuntime.watchOS-11-5 watchOS 26.0 (26.0 - 23R351) - com.apple.CoreSimulator.SimRuntime.watchOS-26-0

I removed and redownloaded iOS 27 platform again and still no luck.

@mwcs01 Thanks, have you tried to download the simulators manually from Xcode as @newwbee recommend?

Open Xcode 27 Beta. Go to Xcode > Settings > Platforms. Ensure that iOS 27.0 Simulator is listed and fully downloaded. If there is a "Get" button next to it, it hasn't been downloaded yet.

If it shows as downloaded but isn't working, right-click it, select Delete, and re-download it directly through this menu rather than externally. Also check the last message on this thread https://developer.apple.com/forums/thread/829680

Albert  WWDR

Hello @newwbee , @DTS Engineer ,

iOS 27 Simulator is fully downloaded. I get this from the Info on Platforms.

"iOS 27.0 beta (24A5355p) SDK + Simulator (Installed)"

Command line gives me this list of runtimes:

== Runtimes == iOS 18.6 (18.6 - 22G86) - com.apple.CoreSimulator.SimRuntime.iOS-18-6 iOS 26.5 (26.5 - 23F77) - com.apple.CoreSimulator.SimRuntime.iOS-26-5 tvOS 18.5 (18.5 - 22L572) - com.apple.CoreSimulator.SimRuntime.tvOS-18-5 tvOS 26.5 (26.5 - 23L470) - com.apple.CoreSimulator.SimRuntime.tvOS-26-5 visionOS 2.1 (2.1 - 22N580) - com.apple.CoreSimulator.SimRuntime.xrOS-2-1

XCode select pointed to the Xcode 26 installation. I switched that manually to the beta installation. Also, I set the command line tools to the SDK 27 version. The computer was restarted after all those adjustmsens, but still it is not possible for me to create iOS 27 simulators.

I just tried after all those adjustments to download tvOS 27 SDK. But also for that one no tvOS 27 simulator is created or can be created.

On and I tried to kill the CoreDeviceService but this did not help either.

Hello, @b.n.ch.

I had the same issue, but realized what was happening: all the simulators that I tried to create in Device Hub were being run in the old Simulator app. I solved this very quickly by simply rebooting my Mac. Then, all the simulators I created appeared in the Device Hub.

@b.n.ch This is very interesting that following all the troubleshooting and even rebooting is not fixing it. At this time I think looking at your sysdiagnose from the macOS will help the team figure it out. Would you be so kind to file a bug?

Once you open the bug report, please post the FB number here for my reference.

If you have any questions about filing a bug report, take a look at Bug Reporting: How and Why?

Albert  WWDR

@b.n.ch

From Xcode 27 Device Hub unable to create simulator: This is due to a known issue in Beta 1 where CoreDevice is not using the newly installed CoreSimulator content, leading to no simulators showing up. The best workaround is to run kill -9 CoreDeviceService in Terminal to get CoreDeviceService to restart and pick up the new simulator content (you shouldn't need to reboot your Mac).

Thanks @DTS Engineer for your feedback and help on this matter. I just opened a Bug report. FB23239936