Activation Lock
One of the more notable security-related features in macOS Catalina is the addition of Activation Lock for T2-equipped Macs. That doesn’t sound like much, but it could actually be huge for physical security.
Basically, it means you can render a Mac useless to thieves remotely. The owner of the Mac would be the only one who can deactivate the lock. In conjunction with the new offline tracking feature in the Find My app, this could make Macs much more recoverable and much less attractive to criminals.