There are some preferences stored in com.apple.Accessibility that are required to be read and updated on macOS
Created attachment 430325 [details]
Created attachment 430369 [details]
Created attachment 430373 [details]
Comment on attachment 430373 [details]
Committed r278412 (238437@main): <https://commits.webkit.org/238437@main>
All reviewed patches have been landed. Closing bug and clearing flags on attachment 430373 [details].