Starting with macOS 10.15.4, which arrived on our computers a few days ago, when is an application that we installed kernel extensions for upload We will be notified. These extensions will stop working on the next version of macOS, certainly the 10.15.5 we will see in the WWDC and will reach the general public in September.
Extensions for?
Kernel. A kernel, which we can define as a kernel or root, is part of the most important app and that it works in lucky mode (with multiple permissions). The kernel is responsible for providing unique applications with secure access to the hardware of our Macs. This kernel, like the rest of the operating system, has other functions. When a developer wants to extend kernel operations to include a kernel extension, the kext.
Given the importance of the kernel, on Mac or any other operating system, its extensions should be used correctly. Malicious software can only use these extensions hide their processes or files and get ignored by the user and the operating system. Given this situation, Apple introduced the OS X Yosemite protocol for developers who wanted to install system extensions. They had to ask Apple's permission and digitally sign the extensions to work. Now safely Apple will go down, exactly with macOS 10.15.5, all kernel extensions.
Legacy system extensions, Catalina notice
In 2019 Apple has introduced developers to macOS Catalina will be the last operating system with support for kernel extensions, which calls the extensions of the legacy program Apple has, from the day of the announcement, a few tools so developers can continue to enjoy the same options without having to download the program extensions.
Now, with macOS 10.15.4, our Mac will show us the message when the program extension is loading first, and we will do it from time to time while it is running. As users, information allows us to know that the application we are using must be updated
Thanks to this initiative, leaving the kernel extensions and replacing them with the latest and safest methods, Apple is able to ensure that the security of our Mac remains a record in the market.
More details | and developer.apple.com