Hi, I'm Bhavik. Welcome to JustAnswer. I'm reviewing your question now, and will reply back ASAP.
Please download HP Easy scan and try to scan using this, This should resolve your issue :-
Did you download and installed drivers from this webpage ?
Actually this problem is only for 10.12. For other version this problem doesn't exist.
You can try these steps mentioned in below link to get rid of this problem :-
That's great !!.
Now you can just wait for either apple to get better update for it next time or HP to come up with some solution to resolve this compatibility issues.
There is nothing much we can do with it now.