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I updated to the latest AppStore release of Xcode (12.3, 12C33).
It worked fine for an hour or two. After that it started to constantly freeze after being open for a few seconds to minutes.
I've tried the following, all without success so far:
restart macOS
clear derived data
tried with different projects
updating to latest macOS 11
Any other ideas or suggestions how to fix this?
Update
I can confirm that this is fixed in Xcode 12.5
I found an answer by Darr on the question "Xcode freezes after upgrade to 12.3" on Apple's developer forums that worked for me:
Unpairing my device connected via network and using only lightning cable seems to have resolved the issue for me.
Xcode > Window > Devices and Simulators > device > Connect via network
After going mad, I fixed this by removing all devices from Devices and Simulators (I had connect via network activated).
For now, it's working fine.
Power off your Apple Watch
Xcode may hang if the host Mac is connected to an iOS device which has one or more companion watches. The hangs occur when the watches aren't fully prepared for development, or if they are experiencing poor wireless connectivity. (72490921) (FB8945320)
Workaround: Power off the watches, or unpair them from the iPhone.
Xcode 12.4 Release Notes
You can force Xcode to freshly prepare a watch for development using these steps:
Force-quit Xcode.
Power-off and disconnect all iOS device from the Mac.
Reboot the Mac.
Launch Xcode, close all projects, and open the Devices and Simulators window.
Power-on and unlock an iOS device and its companion watchOS devices by entering the passcode as required.
Plug the iOS device into the Mac using USB cable.
Check each iOS device and each watch for any pairing request and approve the requests.
Monitor the status of device preparation in the Devices and Simulators window. If Xcode presents device-preparation errors, follow the guidance in the error message to resolve the error.
Once Xcode finishes preparing the iOS device and its companion watches for development, repeat steps 5 through 8 for each remaining iOS device and its companion watches until you verify that Xcode has prepared all devices for development. You may now open your Xcode projects and resume development.
I've been having the same problem. I had an iOS device connected via USB, unplugged it and it un-froze. Then I continued to have issue requiring force close each time.
I then clear derived data and things have been fine. I opened a StickerPack project and also had the same issue. Clearing DerivedData also fixed it.
Clear Derived Data:
Xcode pulldown menu > Preferences > Locations tab
Click the little arrow next to the path under Derived Data.
Delete the entire folder for you project. It will look like "MyAppName-bwonddotztrgkkfexrjxoncvmjit"
See this explanation about whether it's safe to delete DerivedData for your project.
I had the same problem with appstore version and someone advised to install from site, now it works fine. https://developer.apple.com/download/more/
Disable WLAN on my iMac fixes the problem currently.
Hope they will releast a fix very soon.
Xcode 12.3 is unstable and many times it crashes.
I reverted back to Xcode 12 and copied disk image of 14.3 in Device Support folder of Xcode (Contents > Developer > Platforms > iPhoneOS.platforms-DeviceSupport).
This I needed to debug on iPhone device having version iOS 14.3
https://github.com/mspvirajpatel/Xcode_Developer_Disk_Images/releases
I recently had similar situation. My Xcode 12.3 project could not be opened. I tried to open directly from popup that appears on start of the Xcode.
What worked for my was to downgrade Xcode to 12.2 and launch Xcode on new project. And then click my old one.
Maybe it would work without downgrading but I didn't check.
I had this problem too. I fixed it by going Devices and Simulators in the Windows file and disconnecting the iPhone reference I had for my phone when testing and app. Since the phone was no longer connected, its presence seemed to create a freeze.
In my case XCode 12.5 hangs/freezes on startup more or less instantly, right after it opens kind of an empty workspace.
I removed everything that I could imagine that deals with XCode on my machine, but it didn't help.
At the end I just used the hotkey for "Close Workspace" - Ctrl+Alt+Cmd+W
I hit this combo very often, very fast right after opening XCode and it worked!
The strange empty workspace showed up and closed instantly - now I could select other projects and everything works again.
There could be the multiple reasons and in my case reason was source control
preferences > Source Control > uncheck Enable source control
I have these performance problems with the newly updated Xcode from the AppStore to 12C33 (Xcode frozen for many seconds, instability of interface builder, etc.) only with apps which have frameworks added with cocoa pods and when working in the xcworkspace-file. (Integration of frameworks with Catharge even fail with error message 65). I'm running Xcode under macOS Catalina. Don't know what the technical reason could be, hence would appreciate if someone has an idea on this how to fix it.
Update: In the meantime I could fix it:
I eliminated my own devices from the device list and did then a deintegration and a new install of the cocoa pods for the projects. Afterwards I setup my devices again in the device list and all worked well again. Only eliminating and reintegration of my devices as described above didn't work in my case.
In Xcode 11 GM Version can't launch Car Play audio application in the simulator.
Simulator stuck on the loading screen, then show "Unable to connect" error. Sometimes shows only black screen or crash on app launch.
While debugging, I see that methods from MPPlayableContentDataSource and MPPlayableContentDelegate won't fire. On Xcode 10 all work fine, so it's looks like some bug in new Xcode 11. Maybe someone knows how to solve this problem?
Thanks indeed.
I submitted a radar (FB7514196) to Apple.
You can see a copy of the radar here: https://openradar.appspot.com/radar?id=4997629368860672
Just installed Xcode 11.3 and I'm still having this problem. Contacted Apple via the Feedback Assistant and the response was:
Please ensure you're providing a prompt response to
MPPlayableContentDelegate and MPPlayableContentDataSource when you app
launches on the car screen. You have a few seconds after launch before
we show this timeout screen.
The first thing I do when starting the app is to set up this delegate and data source, so that's not the issue. Maybe something related to setting up CarPlay changed in the iOS 13 SDK.
Xcode 11 and Xcode 11.1 seem to contain a broken CarPlay implementation. Xcode 11.2 (beta-1) seems to work much better here. That said, the CarPlay simulator is finicky anyways and you should really use a real head unit to test your programs. I have found simply closing and reopening the CarPlay simulator to help with many issues, btw.
Still the same issue here with XCode 11.2.1
Anybody found a solution?
The CarPlay simulator has always been a total disgrace - for years!
I am developing a TvOS app and having issue with interface builder, when I drag objects like Buttons, labels, segments and etc... the current view show me nothing!!! only a blank rectangle that shows position and area of that object
When I run the application objects will be shown fine!
What is wrong with the interface builder?
Xcode Version 7.1 (7B91b),
OS X version: 10.11.1 (15B42)
At the top of that screenshot there is an error.
"An internal error occurred. Editing functionality may be limited"
Solution :
I had transferred all my files via Transfer Assistant form old mac to the new one , so I think this might cause the problem ! the final solution was I created admin new account and the problem is gone ! Unfortunately updating to Xcode 7.1.1 did not any help !
If you face with the same problem be careful backup all data from your current user account.
I get this a lot. I usually just quit out of Xcode and open it again and it will work most of the time.
Just update the Xcode to "7.1.1 (7B1005)", I hope this will solve your problem
I tried to put the buttons on the storyboard its working fine
I am trying to create a Table View Controller in my storyboard and when I change from "Dynamic Prototypes" to "Static Cells" Xcode stops responding until it eventually crashes.
What I tried so far:
Re-installing Xcode;
Clear Xcode folders under ~/Library (including DerivedData);
Creating in a new project (still crashes);
Ask a colleague to create a Table View Controller with static cells in the same project. He can do it on his computer. I can see the Table View on my computer and even edit rows, but I cannot add sections.
Tried both Swift/Obj-C projects, with or without Core Data;
I am using XCode 6.1.1 (6A2008a), the same as my colleague.
Please help! Thanks!
Yes , I have faced similar problem .please try with Xcode 6.3.x or later version .
Not a fix but may help some. I noticed this was only happening to me when I had two windows of my current project open. Was reworking a storyboard, so I had the old and new side by side. When I closed the windows of my project that I was not currently editing, Xcode did not crash. With more than one window open, editing a Static Table View would crash Xcode EVERY time.
I found a temp Fix. I also noticed that my dock isn't working fine (I can drag and drop things into it or in it). So I rebooted the mac and this fixed the dock problem, I tried quickly in Xcode and it worked. I guess it's something with Mac OS not just Xcode
Just updated to Xcode 5 and this is the first error its throwing on the logger for all my apps. Can't seem to understand why this is happening.
2013-09-19 10:46:54.341 MyApp[1156:a0b] Cannot find executable
for CFBundle 0x8a7c7a0 </Applications/Xcode.app/Contents/Developer/Platforms/
iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk/
System/Library/AccessibilityBundles/CertUIFramework.axbundle> (not loaded)
Edit (11-11-2013): To everyone reading, once I waiting for a solid working solution to accept and close. The highest voted answer works until you re-open the project only.
Edit (30-09-2014): I can see this has been sorted since XCode 6 has been released! Finally
Final Edit-
Temporary workaround: click iOS Simulator > Reset Content and
Settings... and run again.
This error message may reappear at random. For me, it happens when I
launch a different application. There are several threads in Apple dev
forums and in StackOverflow about this problem, but none have a
definitive answer. This seems to be a SDK error to be fixed in the
next Xcode version.
Updated: October 3.
CREDIT - Please check this answer - Xcode 5 Error CertUIFramework.axbundle
Further Edit
Although this was potentially the issue resolution at the time. I believe some of the newer answers below relating to the better touch tool are in fact the correct resolutions.
After reading Kirill's answer I did some digging as I didn't want to disable BetterTouchTool for everything just the "iOS Simulator" and you can.
Open the "iOS Simulator" and will it as the active app go to the BTT drop-down menu from the top bar (of that screen if you have more than one) and select "Disable BTT for Current App". It will turn to a play icon when it's disabled.
Make sure the app name on the bar is still "iOS Simulator" as mine jumped to "Finder" a few times when I clicked the top bar!
Now re-set the simulator (if it doesn't work) and rebuild. You shouldn't get the error! :)
Don't forget to clear the error if it's still there. ;)
BTT seems to remember what apps it's disabled for (or at least it does when you close and re-open the app that's disabled I haven't tried a system re-boot yet).
Its easy. Go iOS simulator and reset content and setting.
Thanks
If you are using XCode-5 then just reset the simulator "Reset Content and Settings" and run once again
So I was having this error too in Xcode 5 and 5.1. I wanted to figure out if it's Xcode bug or something else, so I did a fresh install of Mavericks 10.9.2 and Xcode 5.1. Everything seemed fine after multiple tests.
Here is where the problem began. I put the apps and settings that I mostly use and the error came back. So I deleted everything and started adding everything one by one. After couple days I had bingo! The problem is with BetterSnapTool and BetterTouchTool
Update 12.12.2014
Just started using Xcode 6.1 and noticed that this bug seems to be gone at least with Xcode 6.1 simulators and BTT 0.9985 versions.
Update:
As GasB pointed out, it is possible to disable BTT for certain apps. So just disable it for iOS Simulator. You just have to remember not to use gestures while using the simulator as that triggers the error message.
Simple solution:
Remove the ticks in preference pane, reset simulator and do clean build. The error message will disappear.
.
I had the same problem and solved it setting the 'Localization native development region' to match my systems region. In my case from 'en' to 'de'. The referenced files are stored in localized versions in your filesystem. So this setting is used to identify the needed version.
You can find that setting in your project settings at 'Info' -> 'Custom iOS Target Properties'.
Resetting the simulator ‘fixes’ it because it turns the accessibility support off. You can normally achieve the same by simply disabling the ‘Accessibility Inspector’ in the ‘Settings’ app.
If, however, you need it enabled, particularly hate this error message, and are feeling adventurous then you can use the following monkey patches to silence the error: https://gist.github.com/alloy/9277316. (Be sure to NOT include this in your release builds.)
Resetting the simulator is a PITA, I found a way to get rid of these messages without having to to this:
go to Settings > Accessibility
turn on Accessibility Inspector
turn off Accessibility Inspector
quit Simulator
I had this problem with Xcode 5 in ML 10.8.5
I re-installed Mountain Lion (in a Parallels' VM), then update ML to 10.8.5.
Then installrd Xcode 5, and it's worked fine.
I think that the error is caused by a third SW installed in ML.
The application Moom is also causing this issue, and I couldn't find a way to disable it for just the iOS Simulator. So for now I disabled it's accessibility features.
I'm on Mavericks (10.9.3) and encountered the same error in xCode(5.1.1).
I tried anything - reinstalling xCode from both AppStore and dmg. Resetting the emulator resulted in the same error and deleting the Simulator SDK folder gave no results too.
The issue on my end was indeed Moom as mentioned by #aorcsik! Disabling it's accessibility, followed by clean (cmd+shift+k) in xCode cleared the error.
Open Disk Utility and apply Repair Disk Permissions in Macintosh HD.
After doing above step, apply Reset Contents and Settings in iOS Simulator.
This above solution can definitely fix your problem.
I had this problem, and none of the answers in this thread could fix it. Mine was simple UI with a UIDatePicker. I resolved it by removing the UIDatePicker and the associated code, then added them in again. Problem solved!
For me it was Keyboard Maestro, adding the simulator to Maestro's exclude list silenced the warnings