Apparently, OSX Yosemite has problems sharing the Ethernet internet connection to WiFi users. This is a major problem. Apparently, only one device is able to connect and use the internet via WiFi. If you have more than one device, the other devices will hang and not get a connection (stuck on authorization). So if you have an iPhone and an iPad, only one can connect to the Mac (I have Mac Mini 2009 edition). Sometimes NONE will connect! I think I nailed it down to where the problem is... Firewall. Before, on Mavericks, I was able to connect multiple devices and share the Ethernet to go on the internet by letting OS X Mavericks share the ethernet connection over WiFI. After I upgraded to Yosemite, none could connect, or only one can connect. What is the solution? Turn off firewall. Apparently, the firewall is preventing devices from connecting and getting a shared connection to the Ethernet via WiFI. By turning it off, you can get a connection, then you can turn firewall back on. THIS IS WEIRD! Why is it happening? If you share your Ethernet to devices that connect via WiFI they don't need a new firewall setting to use Yosemite's Ethernet to access the internet! Something is terribly wrong. No QA?