I've bought a second hand iMac, Intel Core 2 Duo with Mountain Lion. The disk drive doesn't work, there isn't a Recovery Partition and I don't have the password or master password.
Is there a way I can reset the password?
Is there a way I can reset the password?
The seller did not properly Erase and Reinstall OS X for resale and you should return it to them.
see > What to do before you sell, give away, or trade in your Mac - Apple Support
To properly Erase and Reinstall the OS X and set it up as your iMac,
you need to try the original gray disc set or a retail Snow Leopard Upgrade DVD in an external USB disc drive
or optionally, use another Mac to create a bootable installer on a USB flash drive or external USB hard drive.
see > How to create a bootable installer for macOS - Apple Support
Is the Hard Drive Locked with FileVault?
How to change the admin password on a Mac…
https://www.macworld.co.uk/how-to/mac-software/change-admin-password-mac-3535328/
See if you can create a new administrator account by restarting the Setup Assistant:
Be very careful to notice the spaces in those Terminal Commands.
Once you've done that the computer reboots and it's like the first time you used the machine, except all your data will stile there. Your old accounts are all safe. From there you just change all other account passwords in the account preferences!!
Force Removing Password Protection
1) Add or remove DIMMs to change the total amount of RAM in the computer.
2) Then, the PRAM must be reset 3 times. (Command + Option + P + R).
The seller did not properly Erase and Reinstall OS X for resale and you should return it to them.
see > What to do before you sell, give away, or trade in your Mac - Apple Support
To properly Erase and Reinstall the OS X and set it up as your iMac,
you need to try the original gray disc set or a retail Snow Leopard Upgrade DVD in an external USB disc drive
or optionally, use another Mac to create a bootable installer on a USB flash drive or external USB hard drive.
see > How to create a bootable installer for macOS - Apple Support
I've bought a second hand iMac, Intel Core 2 Duo with Mountain Lion. The disk drive doesn't work, there isn't a Recovery Partition and I don't have the password or master password.