This only secures DNS, not the advanced anti-phishing lists Intra uses. For full Intra functionality, the emulator method is superior.
Newer macOS versions allow you to configure encrypted DNS profiles without third-party software. Download Intra for PC -Windows 11 10 8 Mac-
Intra is a project by Jigsaw (part of Google). This guide is for informational purposes. Always comply with local network policies. This only secures DNS, not the advanced anti-phishing