I think that it is possible to reset the administrator password in OS X without any restore CD or installation CD. The solution is enter into the terminal and make a new admin account: Follow these steps:
- Reboot the system
- Hold apple + s down after the sound
- When you see the text prompt window use these commands one by one hitting return key to create new admin account
mount -uw /
rm /var/db/.AppleSetupDone
shutdown -h now
- Reboot the system once again and login as the new admin. Now you can simply delete the old one and install the printer software without any issue.
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