Your account already has a signing certificate for this machine but it is not present in your keychain

Question

I get this error, verbatim, when trying to build and install to a device.

This is my environment:

• Xcode 8
• El Capitan

Has anyone run

Answer 1

Go to Xcode Preferences -> Accounts tab -> Double-click your team name -> Click the + at the bottom left of the dialog box that appears -> Select iOS Development.

This will create a new development certificate that will allow you to install and test on your device.