If you attempt to install or update the HP software on Lion using the software CD that came with your product, or using a previously downloaded driver, an 'Unsupported Operating System: This installer is not compatible...' message displays.
Figure : Unsupported Operating System message
If you receive this message during installation, do not worry. This is expected behavior. The message merely notifies you that you must obtain the HP software for OS X 10.7 Lion in another way.
To resolve the message, continue with the instructions in this document to install the HP driver from Apple Software Update.