Unlocking an iMac without a password can be a frustrating experience, but there are several methods you can try to regain access to your device. Before we dive into the steps, it's worth noting that if you have no chance of recovering your lost login password and nothing is going to work, you may need to consider visiting your nearby Apple Store or booking an appointment with Apple Support.

One method to unlock your iMac without a password is to perform a clean install. This process will erase the internal drive from the Disk Utility window in Recovery mode, effectively wiping your Mac like it's new. To do this, restart your Mac and immediately hold down the 'Command + R' keys. Release the keys when you see the Apple logo and select 'Disk Utility' from the Utilities menu.

Another option is to reinstall a new copy of macOS without losing any data. To do this, restart your Mac and hold down the 'Command + R' keys until you see the Recovery mode screen. Select 'Reinstall macOS' from the Utilities menu and follow the on-screen instructions to set up a new copy of macOS.

If you're unable to access your iMac due to a forgotten password, you can try resetting it using the built-in Reset Password utility. To do this, restart your Mac and immediately hold down the 'Command + R' keys. Release the keys when you see the Apple logo and select 'Utilities' from the menu bar. Click on 'Terminal' and type in 'resetpassword' and press return.

Once you've opened the Reset Password utility, you'll be presented with a screen that allows you to reset your password. Select the user account you want to reset, enter a new password or leave it blank, and click 'Save'. If you're unable to access your iMac due to an Apple ID login requirement, you can try selecting the 'Forgot all passwords' option.

If none of these methods work for you, you may need to consider seeking assistance from Apple Support. They can help you troubleshoot the issue or provide additional guidance on how to unlock your iMac without a password.

It's also worth noting that if FireVault is enabled on your Mac, it will prevent you from using some of the above methods. To disable FireVault, go to System Preferences and select 'FireVault'. Then, simply restart your computer and login with your new password.

In summary, unlocking an iMac without a password can be challenging but there are several methods you can try to regain access to your device. By following these steps, you should be able to reset your password and gain access to your Mac once again.

How to unlock an imac without password