My children's mac keylogger is installed on my children's computers https://www.refog.com/mac-keylogger.html 

The software is designed perfectly for use on home computers. Parents can make sure their children are not going to illicit sites, downloading music illegally, or chatting with dangerous people. Parents can read chat conversations, check the screenshot history, and look at a list of visited web sites from their children's computer activity. The Refog Keylogger provides a full-range of versatile surveillance features for the home.

This is a really good solution for those with children. Let me give you a simple case. I myself love online games, for example, playamo mobile casino. This site contains many small slot games. These games are bright and simple to look at. But here they play for real money. My kids love games too)) And I don't want them to spend my entire deposit once. Therefore, parental control reliably cuts them off from access to such resources.