The Mac has very good parental controls, but it isn’t as easy as I’d like to simply block Messages and FaceTime . Hopefully Screen Time will be supported on the Mac someday. For now, if you are trying to setup a “Homework Computer” for the kids, here is a way to block Messages and FaceTime using Little Snitch. Little Snitch Little Snitch is a network connection filter. Allowing you to allow or deny network access attempted by particular software on your Mac.