We recovered a MacBook from our Marketing manager; it was the only Mac in the company so our skills with it are somewhat limited.
The Mac boots fine and logs in, but we are stuck with doing admin-type things. Whenever we wish to install an app, or change settings, etc, we are prompted for the admin password - which we do not know. It is possible we could ask the ex-Marketing manager but she is ex-staff and I don't know her personal number.
I know in Windows I have a variety of options, eg boot from a Linux CD with tools to reset the Windows admin password, but I am an ignoramus about this on the Mac.
Alternatively, we consider it may be possible to reformat the Mac and reinstall MacOS, but in this situation we don't have any of the CDs - the lady "lost" them somehow, which includes MacOS as well as Adobe Creative Suite plus MS Office. I'd prefer to retain the software (which was legitimately purchased).
If anyone has suggestions I would be grateful - thank you.