https://flipboard.com/@marryalen/hp-printer-offline-mac-3bqgjr79y

https://diigo.com/0t35vg

https://www.pearltrees.com/marryalen2#item527483828

http://www.4mark.net/story/9762390/troubleshooting-methods-to-fix-hp-printer-offline-mac-issue-with-easy-steps