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I have just installed iOS 14 beta and updated Xcode to latest Version 12 beta 3.

I get an error like *Unable to locate DeviceSupport directory with suffix 'DeveloperDiskImage.dmg'. This probably means you don't have Xcode installed, you will need to launch the app manually and logging output will not be shown! Could not run build/ios/iphoneos/Runner.app on 00008020-001338A20E01002E. Try launching Xcode and selecting "Product > Run" to fix the problem: open ios/Runner.xcworkspace* when I run app from flutter.

I am able to run the app from Xcode but the app won't open / app crashes once USB Cable is disconnected.

Please Help me to figure out what's the issue and work around

Sulfy
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1 Answers1

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I had the same problem with Xcode 11.5 I go to https://github.com/filsv/iPhoneOSDeviceSupport, download iOS 14, then copy and paste into /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/. It works fine.

An Lam
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    Upgrade to Xcode 12. Will also fix this issue. :) – Rafsan Uddin Beg Rizan Sep 18 '20 at 11:49
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    thank you An, you save me for infinite XCode upgrade – bl4ckr0se Sep 18 '20 at 16:09
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    Unable to locate DeviceSupport directory with suffix 'Symbols'. This probably means you don't have Xcode installed, you will need to launch the app manually and logging output will not be shown! – Midhilaj Nov 11 '20 at 12:12
  • https://giphy.com/gifs/denzel-washington-my-man-Jpv9Siby42bD9gDxH9 – Bolling Apr 27 '21 at 08:23
  • Thanks, this worked. For me, iOS software was updated from 14 to 15, and it stopped working, updating DeviceSupport worked. I ran into Observatory port issue after this, which I fixed using https://github.com/flutter/flutter/issues/72161#issuecomment-968347016 – master_dodo Nov 14 '21 at 19:11