log in issue
how to reset, forgot username and password
iMac Line (2012 and Later)
See if you can recover the ID/password.
Apple ID - How to find your Apple https://support.apple.com/en-us/HT201354 An iCloud e-mail address is an Apple ID.
Apple ID - Find https://iforgot.apple.com/appleid#!§ion=appleid
Enter the Apple (iCloud) ID and click Forgot Password.
Apple ID - Manage https://support.apple.com/en-us/HT201487
Apple ID – Forgot Password https://support.apple.com/en-us/HT201487