Press the power button to turn the iMac off.

Type in your username and password (if you have one set) when prompted to log in with administrator rights, then enjoy using your newly reset iMac!.

You will hear another startup tone here, which means that booting is complete and your computer is now reset to factory settings!

Let go of Command-Option-P-R for now, but keep holding down Option and R until your Mac restarts again. Wait until you hear a second startup tone (about five seconds long).If you see a spinning disc cursor instead, try holding down Shift as well, then let go of all keys when you see the Apple logo appear on the screen. Hold down Command-Option-P-R at the same time and let go when you see the Apple logo appear on the screen.Press the power button to turn it back on again.How To Factory Reset iMac Without Password

This article covers everything you need to know about resetting an iMac without a password. The bad news is that it’s not as simple as turning it off and back on again. The good news is that you can factory reset it without a password. Did your kid find his iMac and start browsing the Internet? Did your spouse catch you looking at cat videos on it again? Did a guest leave behind their browsing history and browser cookies? Or did someone just press all the wrong buttons on your desktop machine while trying to figure out how it works? If any of these situations sounds like something that happened with your iMac, we have good news - and bad news.

How to hard reset imac without password