Getting old iMac up and running.
I'm not a Mac user but my son was gifted an older iMac - I'm not sure which one exactly. I've been able to get to the internet recovery but I'm being asked about reinstalling the OS (Maverick?). There is nothing listed in the startup disk option. Pretty baffled as to where to even start or if this is even still a usable device. It looks great and he's really excited about so I'd like to at least try.