Xcode 9: Could not attach to pid

Question

I\'ve been facing an issue (frequently) with the recent major release of the iOS application development tool - Xcode 9-beta.

It\'s showing me the following error fr

Answer 1

Even on Xcode 11.1/2/3

It is an Authorization issue with Simulator, When Simulator does not have the necessary access. It raises the issue.

Try following in Terminal

sudo DevToolsSecurity -enable

or

sudo /usr/sbin/DevToolsSecurity -enable

Details can be found here