Kernel Extensions Won’t Work in macOS 10.16

1 minute read
| Product News

If you updated to macOS Catalina 10.15.4 recently, you may have seen a warning message about kernel extensions. That’s because Apple is deprecating them in macOS 10.16.

Kernel Extensions

The message refers to “legacy system extensions” and says they “aren’t as secure or reliable as modern alternatives.” Apple is replacing them with an Endpoint Security Framework. In a support page Apple mentions the change:

In 2019, Apple informed developers that macOS Catalina will be the last macOS to fully support legacy system extensions, and we’ve been working with developers to transition their software. By moving beyond these extensions, developers are helping to further modernize the Mac, improve its security and reliability, and enable more user-friendly software distribution methods. A final transition date has not yet been set.

Image of warning about kernel extensions

What the warning looks like in macOS Catalina 10.15.4

The move is meant to increase user security because the kernel is a sensitive part of the operating system that controls everything else. Keeping third-party apps out of this area is a good thing.

Further Reading

[macOS Catalina 10.15.4 Lets You Import Chrome Passwords to iCloud Keychain]

[Tim Cook: Apple Able to Source Ten-Million Masks to Help in Fight Against Coronavirus]

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Thinking of all the kernel panics caused by developers’ bad code. Good riddance. Hopefully this will also shut down the Hackintosh crap.


Hackingtosh “Crap” as you put it is just plain fun. I have loved creating lots of mackintoshes over the years. Great times.


Hackingtoshes that is… creating Hackingtoshes has been fun

Temujin W Kuechle

I had at the option of creating a windows box for my dusty shop, or creating a mackintosh. Most of my software and workflows are MacOS based. Apple has decided to make only few models that don’t fit my shops needs, and how can they? They don’t know how I work or what my workflows need. So, I grabbed some used PC parts and made a Hackingtosh I call Uglybox. It has several integrated dust particle filters and several more integrated USB ports than any production Mac computer has ever had. Sure, I could have bought a new Mac, built… Read more »