Storyboard broken after updating Xcode to version 10.3 (10G8) & app no longer is running

Question

I just updated the Xcode to version 10.3 (10G8).

Now my project is not run with this error: enter image description here

/* com.apple.actool.errors */
: error: Failed to find a suitable device for the type IBSimDeviceTypeiPad2x (com.apple.dt.Xcode.IBSimDeviceType.iPad-2x) with runtime iOS 12.4 (12.4 - 16G73) - com.apple.CoreSimulator.SimRuntime.iOS-12-4
    Failure Reason: Failed to create new simulator device that matches IBSimDeviceTypeiPad2x (com.apple.dt.Xcode.IBSimDeviceType.iPad-2x) for runtime iOS 12.4 (12.4 - 16G73) - com.apple.CoreSimulator.SimRuntime.iOS-12-4 (Invalid runtime: com.apple.CoreSimulator.SimRuntime.iOS-12-4)
    Underlying Errors:
        Description: Invalid runtime: com.apple.CoreSimulator.SimRuntime.iOS-12-4
/* com.apple.actool.compilation-results */
/Users/xxx/Library/Developer/Xcode/DerivedData/xxxxx-dxlvvymxzdfqjubnuntqlxggtyja/Build/Intermediates.noindex/xxxxx.build/Debug-iphonesimulator/xxxxx.build/assetcatalog_generated_info.plist

And the storyboard is now like this:

[Same issue of this.](https://stackoverflow.com/questions/57155654/xcode-10-3-installation) Hope it helps you ~~:) — 刘俊利, Jul 23 '19 at 05:21
https://stackoverflow.com/questions/57172619/firebaseui-phoneauth-firebasephoneauthui-fuicodefield-xib-1-failed-to-find-or I have a similar problem — , Jul 23 '19 at 21:52

score 89 · Answer 1 · answered Jul 23 '19 at 19:55

89

Running sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService from terminal solved my problem.

answered Jul 23 '19 at 19:55

Justin Vallely

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@rmaddy, this is a better answer than the accepted answer – ThinkDigital Jul 25 '19 at 02:43
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WOW! That worked like magic! Thanks for your time and effort! – Ahmed Mahmoud Jul 30 '19 at 10:28
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yep, worked for me. had to restart Xcode after the killall9 – Lee Irvine Jul 30 '19 at 22:15
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Worked perfectly for me and it means I don't have to reboot my machine. Thanks! – chazmuzz Aug 13 '19 at 07:33
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OMG this is a JEWEL of an answer! I was freaking out over a project that is going through a SWIFT rewrite — I was this close to redesigning all of the storyboards. You saved me time and effort. – Lloyd Sargent Sep 07 '19 at 21:56

score 87 · Accepted Answer · answered Jul 23 '19 at 04:41

87

I restarted my mac, the problem solved.

answered Jul 23 '19 at 04:41

z33

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This solution also works if you cannot see simulators after the update. – bisma Jul 23 '19 at 09:05
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But, It does not fix the "Release Notes" and the "What's New in Xcode" menus from sending you to https://localhost – Hugo Alonso Jul 23 '19 at 10:10
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the #1 issue I had on Windows+Visual Studio has now appeared on my Mac... – Zun Aug 01 '19 at 08:25
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Who would have thought a one line answer (_looks more like comment to me_) would get so many upvotes.. :) – Zuckerberg Jul 11 '20 at 16:07

score 0 · Answer 3 · answered Aug 11 '20 at 21:49

I had the same issue, all i did is

clear constraint, for my case the source was from UITableView, and make sure constraints are attached to safeare not superview. see image

from toolbar on the top go to Editor > Canvas > Layout Rectangle Very important you have to repeat this step 3 times

Quit XCode and reopen it again , all should be fixed

I've noticed this happen when i switch view for different devices 8, 11, 4s

Good luck

Storyboard broken after updating Xcode to version 10.3 (10G8) & app no longer is running

3 Answers3

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