Xcode error connecting to simulator “Software caused connection abort”

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QUICK FIX

This is happening because you have multiple versions of Xcode installed. MacOS unfortunately only supports running one version of Xcode at a time, and it needs to know the location of the currently running version. To sort things out, choose one of the following:

Quit all instances of Xcode and restart it

Try one of the other options below if that hasn’t solved it.

Using the command line:

  1. run sudo xcode-select --switch /Applications/your_custom_folder_if_needed/Xcode.app

  2. Restart your terminal and Xcode and it will work just fine.

No-command line users:

  1. Quit all instances of Xcode
  2. Start the instance of Xcode that you want to use
  3. Go to Xcode -> Preferences -> Locations
  4. Select the correct version in Command Line Tools
  5. Done!

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