Hello Planko,
Welcome to the HP Forums! I understand your concerns using your Officejet 7210. Since Mavericks is still fairly new, there is no full feature drivers for your printer.
How is this printer connected? Wireless or USB?
In order to install this software, you have to perform an Apple Update. I will provide a HP document on performing this step here.
If you are unable to scan a document after installing this new software, then there is workarounds you can try. Please click on the document above, then click on "How do I scan with the driver from Apple Software Update". There is three workarounds you can try.
Please let me know if you have any further questions.