xcode 15 Beta 5 iOS Simulators... Springboard Crash & High CPU

me too , simulators are pretty much unusable on my intel mac, i would submit a feedback, i did as well about the transparency issue.

If you change the GPU Selection to use "Prefer Integrated GPU" it solved both issues.

I'm having similar issues with XCode 15 beta 5 and CPU usage while running simulators. For me, diagnosticd is the prime culprit, every time a simulator (preview) updates, or I open a new one. It does tend to quiet down after a while, but it pegs my CPU pretty badly for a good minute or two.

I'm on a 2018 13 inch Macbook Pro, 2.7 GHz Quad-Core Intel Core i7. Running an iPhone 14 (iOS17) simulator.

I've uninstalled other versions of XCode, and uninstalled and reinstalled XCode 15 beta 5.

Console doesn't give me any clear picture. Probably unrelated, but I do see a number of consecutive crashes for "AegirPoster" (identifier "com.apple.NanoUniverse.AegirProxyApp.AegirPoster") with responsible process "SimulatorTrampoline".

Posting in case others have similar symptoms.

Also seeing a similar issue. Noticed my MacBook Pro M1 (2020) was getting ridiculously hot, saw one SpringBoard process and two diagnosticsd processes each taking between 70%-103%. I'm running macOS 14.0 Beta (23A5301h) and Xcode Version 15.0 beta 5 (15A5209g), and had the Simulator open.

Console shows a near constant spamming of the following messages from SpringBoard:

default	12:42:48.635344-0500	SpringBoard	[0x1363526c0] invalidated on xpc_connection_cancel()
default	12:42:48.635365-0500	SpringBoard	[0x1363526c0] activating connection: mach=false listener=false peer=true name=com.apple.systemstatus.peer.0x1363526c0

Closing my Simulator was the only thing that got it chill out.

Also having performance issues and SpringBoard errors with simulators. I've reinstalled Xcode 15 beta 5 after removing Developer folder content in system and user libraries to try to workaround those issues, but that didn't help. Besides what has been said in this thread, I did noticed iOS SDK is not properly registered in Xcode ever. SDK version remains 21A5291f and is not updated with 21A5291g for the latest SDK. I'm attaching a screenshot with that particular issue.

Xcode 15 Beta 6 seems to improve some of these issues. Previews and simulators are still slow but I have not seen springboard crashes in this Xcode release so far.

I'm seeing similar issues with beta 4, 5 and 6 now with symptoms similar to @jtfrench.

I've taken a sample of SpringBoard and it always seems to be consuming all of the CPU in STStatusDomainXPCClientHandle, trying to do something with simulator entitlements.

xcode 15 Beta 6 iOS Simulators practically unresponsive. Tried on both iMac and MacBook Pro. Not viable to work with.

Xcode Version 15.0 beta 7 (15A5229h) has the same problem.

It's burning my legs!

I've got the same Console infinite spam from SpringBoard:

default	12:42:48.635344-0500	SpringBoard	[0x1363526c0] invalidated on xpc_connection_cancel()
default	12:42:48.635365-0500	SpringBoard	[0x1363526c0] activating connection: mach=false listener=false peer=true name=com.apple.systemstatus.peer.0x1363526c0

Switching the simulator to "Prefer Integrated GPU" fixed that.

My machine is MBP 14" M2 16GB

To me, simulator performance improved so much after removing all content on /Library/Developer and /Users/<user>/Library/Developer folders. It seems like there were remaining files on those folders interfering between the latest xcode beta version.

Currently, I see many of the following simulator log errors, but don't seem to cause major performance issues.

21:41:37.870260+0200 apsd <APSUserCourier 0x10e506160 development 0> invalid presence without server timestamp. Rolling token... 21:41:37.977540+0200 familycircled Connection for <APSConnection: 0x600003b0c2a0> differs from current queue!!

Adding a launch argument "-OS_ACTIVITY_MODE disable" has fixed the high cpu usage in my case.

This issue seems to go away on my M1 Mac (Xcode Release Candidate) by running the following command:

/usr/libexec/PlistBuddy /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/Library/Wallpaper/Collections/Collections.plist -c "add order array" -c "add order: string 23EC2CF1-0188-49FC-B214-EC1AB37FE5C4"

This command was taken from a blog post regarding a similar issue regarding the iOS 16 simulator.

The issue is still present in the GM Release of Xcode 15. (This is my shocked face.) It manifests for me anytime I run a playground.

@zettlunic - do you know what "-OS_ACTIVITY_MODE disable" does, precisely?

@riccardo_p - do you have a link or a description of what, exactly, we're adding there?

I'm a little hesitant to use these fixes without a better understanding of exactly what the changes are doing. Thanks!

I am seeing a similar issue on my MacBook Pro 2020 (M1), with macOS 13.5.2, Xcode 15 GM, iOS 17.0 simulator. It goes away temporarily after running killall Simulator, but it keeps coming back. Looking at my top processes by CPU usage in Activity Monitor, I see:

diagnosticd - 87.5% - 2:08.25 SpringBoard - 85.6% - 7:27.90 diagnosticd - 67.5% - 6:36.72 UnityPosterExtension - 20.2% - 1:40.86 PhotosPosterProvider - 19.7% - 1:38.08 ExtragalacticPoster - 19.7% - 1:37.34 CollectionsPoster - 19.5% - 1:40.69