Hello Everyone! So I'm trying to hard reset my iMac (Late 2013) and Mavericks is installed. I restarted the computer and held down 'Command+R" and instead of a recovery screen of listed hard-drives and reboot options and stuff, I get a grey screen with a grey lock on it, and a password entry bar below it. I didn't set my computer up to have a password, so I typed in my Apple account password, and nothing happens. I'm not too sure what other password it might be looking for. Please help!