Make WebKitCaptivePortalModeEnabled user default work on macOS, not just iOS. This helps with testing.
Created attachment 445280 [details] Patch
Committed r286214 (244596@main): <https://commits.webkit.org/244596@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 445280 [details].
<rdar://problem/85818348>