Now that the information of the vulnerability in the WPA2 protocol has been released publicly, here is a link to what has happened: https://www.krackattacks.com/ The WPA2 protocol is used in every wireless device on the market today.  If you don't want to read the whole article, basically what you need to do is to research if your Wireless Router, Access Point, IoT device etc. has had a firmware release to deal with this as well as making sure that all of your operating systems (Windows, Linux and yes, macOS) are updated. For my customers, I have already applied the firmware updates necessary to negate this vulnerability....