Have tried terminal. Password is lost or not recognized. I have tried using advice I found online. There is no disk to reboot. If I try to hold the C key it doesn't have a downward arrow it's up. I tried Terminal, doesn't recognize any commands. I'm fed up and tried using 24/7 paying them and for nothing. I cannot upload Maverick, not enough memory. Any other suggestions? I have more downloaded materials I'll try later but this is driving me nuts.
iMac, Mac OS X (10.6.8), admin password need to reset