I am testing the Xcode 27 Beta and new Device Hub app on my MacBook Pro (M5) with macOS Tahoe 26.5.1, but every time I try to create a new Simulator, the process begins to run, but then fails after this message appears that says “Family quit unexpectedly." I looked over the details of the issue, and it is indeed directly linked to the failing simulator creation. Since this issue makes it impossible to Build and Run any app in the new Xcode 27 beta, it makes it almost completely useless for me. I have already downloaded the iOS 27 simulator, but it fails to boot in the Device Hub.
Xcode 27 Device Hub unable to create simulator
I have the same issue.
Same issue here. The fix is to either fully reboot your machine or run killall -9 CoreDeviceService in Terminal.
Let's keep this thread active for all that experience this, since we shouldn't need a fresh reboot to install Xcode!
Confirmed, works after reboot.
Thank you, @reed.1325 and @l00! I rebooted my device, and Device Hub is now working. I realized, by the way, that the simulators I created in Device Hub were being created in the Simulator app. Hopefully this gets fixed in the next beta