Search for specific file without logging into iMac
Long story short, I have several dozen iMacs I need to search for a specific file. Some of the computers have logins, and I don't have the login info (but will have it weeks from now). Is there a way to search an unencrypted hard drive for a specific file name (or file extension(s)) without logging into iOS? Would the startup utilities offer that ability? Could I create a utility on a thumb drive to do this?
My last resort idea is to use disk recovery to create a second partition, install iOS on that partition, login to that iOS, and use finder to search the first partition for the file in question. This is time consuming at best, and I'm not sure it will work.
So if somebody has an idea about how to search a hard drive for a specific file before bootup, I would be very grateful!