no system administrator listed
i am unable to make any changes to my mac as no admin is listed. i have tried going thur Terminal from restore mode and the only account listed was my log in which is not set to admin. I typed in whoami from the command S option and it did not recognize anything
i am at a loss...is there any way to access my system admin information as nothing is listed in the user/account section besides the way i have tried?
i am hoping to avoid a complete restore if at all possible. would appreciate any and all advice. ty.
iMac, macOS High Sierra (10.13.2)