Q: Fax modem no longer working after Sierra upgrade

I love the idea that people are still using FAX in 2016, with the iPhone 7 just released it brings a smile to be reminded of the US Robotics fax modems. Sounds like you will need to find a patched driver, I can't help but good luck!

There are many online FAX services. There is no need for a FAX modem. This article may help: http://www.howtogeek.com/168841/how-to-send-and-receive-faxes-online-without-a-f ax-machine-or-phone-line/