Brett Terpstra on simple steps to secure macOS Mojave without getting on down and dirty geeky:
Apple frequently releases security updates and is often quick to provide patches for new threats. Keeping your software updated is a critical component of your system’s security, and not everyone checks System Preferences all the time for the latest updates. If you aren’t running macOS Mojave, you should be looking at Software Update frequently. Make it a biweekly to-do on your calendar, even.
Agreed. Apple makes updates easy and mostly painless. Or, get your geek on and dig into Ricard Bejarano’s Hardening macOS.
Your device is not secure, and never will be. I’m not going to lie to you, this guide ain’t no silver bullet, there’s no such thing as a completely secure system. That said, you can make it a lot harder for the bad guys to steal what’s yours, that’s what this guide is made for.