You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Existing software on your system loaded a system extension signed by “Mattias Nissler” which will be incompatible with a future version of macOS. Contact the developer for support.

On my MacBook Pro (MacOS Big Sur v11.2), when the software got upgraded, the above comments came.

Not sure what it means and what action to be taken.

Thank you!

Posted on Feb 5, 2021 6:04 PM

Reply
Question marked as Top-ranking reply

Posted on Feb 11, 2021 9:01 AM

Hi RPI8992,


We see that your existing software isn't loading. Learn more about why you're seeing this message, and contact the developer if necessary:


About system extensions and macOS


Take care.

1 reply

Existing software on your system loaded a system extension signed by “Mattias Nissler” which will be incompatible with a future version of macOS. Contact the developer for support.

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.