IMAC name and PW?

iMacs have been around for over 20 years so it is helpful if we know the exact year and size iMac you have, we also need to know the version of Mac OS. We also need a description of what you are attempting to do and where the problem occurs. We are not clairvoyant and we cannot look over your shoulders so we rely on you to write a description so we can get an idea of what may be going on.

Admin likely, but your question is not complete so that is a guess.

Please read the following user tip and restate your question/problem in detail: Writing an Effective Apple Support Communities Question - Apple Community  ;