Software caused connection abort. Error returned in reply:Connection invalid

Question

My Xcode 9 gives the message to which I don\'t know how to respond. I want to run the app to my simulator, and I am getting this weird message. Attaching the snapshot for the sa

Answer 1

Same error. For me running xcode-select helped:

sudo xcode-select -s /Applications/Xcode-beta.app/Contents/Developer/

Answer 2

• If you are using two versions of Xcode, remove one or quit all Xcode and simulators.
• Go to preferences and Set proper version for command line tools
• click on Derived Data, go to Derived data and delete that folder or simply use rm -rf ~/Library/Developer/Xcode/DerivedData
• Click on Simulator reset content settings and just quit XCode and simulator and open clear and build the Xcode and run it.

Answer 3

Restart Xcode & Simulator. delete the app from simulator make clean & try to deploy again. it works for me.