so i just got these two vintage macs. An LC and an LC II and i want to start playing around with them, but my probem is that I can't use any of them because one is lacking an operating system, now does anyone know which operating system i would need to run these? and the other has a username with a password on it from the previous owner... is there a way to get past the login password or hack it? cause the previous owner can't remember what it was, and he wants to see what kind of stuff he had on his computer back in the day. if anyone knows anything i'd really appreciate it.