How to resolve 'Legacy Developer: Canon' system extension incompatibility with future macOS versions?

Where are you seeing this message?

The presence of the Canon EOS1D driver isn't relevant or significant - that's actually installed as part of the standard system software, along with drivers for various other devices you've likely never connected to your system (Xbox controller, maybe?)

So the more relevant question is where, and when, this message appears? Is it at boot/login time? randomly throughout the day? when you perform a particular action?

TuckerdogAVL wrote:

Existing software on your system loaded a system extension signed by "Legacy Developer: Canon" which will be incompatible with a future version of macOS. Contact the developer for support.

And I don't even, nor have I ever, owned a Canon EOS or connected it to this computer. I have searched Library Extensions and find nothing.

[Re-Titled by Moderator]

if you have a current issue ...

look for application specific related items and delete; each of these locations

from the Finder>Go>Go To Folder copy & paste:

~/Library/Application Support/

~/Library/Preferences/

~/Library/Caches/

~/Library/LaunchAgents/

or Contact the developer for support.

I have a Canon Camcorder and all my Canon software is in the Canon Folder under applications. Most Canon Cameras come with some sort of software. Try a search for any "Canon" files using the magnifying glass icon in top right menu bar. You may need to update your software for future use (if you use any of the Canon features).

That’s an interesting idea.