At the WWDC conference last year, Apple announced plans to deprecate macOS “kernel extensions” (KEXTs) and replace them with a new mechanism called “system extensions.”
The first step towards this announcement was made with the release of macOS Catalina (10.15.0) in September 2019, when system extensions were introduced alongside kernel extensions.
The final step of Apple’s plan will come into effect in the coming weeks, with the upcoming release of macOS Catalina 10.15.4.
