3rd Party Mac Developer Application: DEVELOPER NAME: no identity found
‘Developer name’ is your personal name or company name, depending on whether you have a personal or organisation developer program membership respectively. You're also missing the Team ID from the string, which in the end should look something like this:


  3rd Party Mac Developer Application: John Appleseed (XXXXXXXXXX)


You can find your developer name and Team ID in Keychain Access. Search for "developer" and find one of your certificates. The green section is your developer name, and the blue section is your Team ID.