How do I find out which apps have legacy system extensions?

cacotton wrote:

I got a message after an update on my MacBook that there are apps that have the legacy system extensions that will not be able to work after a subsequent update. I do not know how to find out which apps they are. Can anyone tell me how I can find out?

Did you see the Relocated folder on your Desktop when you upgraded(?) here you may see what you are looking for.

Otherwise from the Finder>Go>Go To Folder, copy and paste:

/Users/Shared

see the Relocated folder an its contents for a possible clue.

If you see a Relocated Items folder after upgrading macOS on ..

All of these will be listed in EtreCheck. Download EtreCheck from https://www.etrecheck.com and run it. Create a new reply and use the "Notes" tool below to add your EtreCheck report. Using the link above, you can download EtreCheck from the Mac App Store or download EtreCheckPro directly.

Disclaimer: EtreCheck is my own app. EtreCheck is free to use but has in-app purchases available. Downloading EtreCheck or using it could give me some form of compensation, financial or otherwise.