I am using a HP Officejet 4500 with my MacBook Pro and trying to scan - Message says "no scan options". What should I do?
If you can't scan, then you will need to use the official support page to download the necessary driver/software.
The most compatible version where the driver can be installed is Mac OS X 10.8. Anything above that, requires additional steps: http://support.hp.com/us-en/document/c04510394/
Support page: http://support.hp.com/us-en/drivers/selfservice/HP-Officejet-4500-All-in-One-Printer-Series---G5/3919445/model/3919447#Z7_3054ICK0KGTE30AQO5O3KA30R1