trying To reuse an iMac that has been format for a few years
can not remember Administor name nor password
also cannot remember password for my specific User Name
can not connect to the internet without a diagnostic which requires administrators name and password
Connect the iMac to your router using an Ethernet cable.
Use the following article to reset your user password.
https://support.apple.com/en-us/HT202860
Then once logged-in, you can re-establish the Wi-Fi connection.
Connect the iMac to your router using an Ethernet cable.
Use the following article to reset your user password.
https://support.apple.com/en-us/HT202860
Then once logged-in, you can re-establish the Wi-Fi connection.
Although there are a number of methods to regain access to a Mac when you forgot its Administrator credentials, they may still require access to the Internet to complete.
Regardless, see if any of the following can help:
IMac password reset
