Bug 1588860 - update update-the-rendering.html expectancies r=botond,emilio

Differential Revision: https://phabricator.services.mozilla.com/D50217

--HG--
extra : moz-landing-system : lando

testing/web-platform/meta/html/interaction/focus/the-autofocus-attribute/update-the-rendering.html.ini

@@ -9,6 +9,7 @@
       if (os == "linux") and not webrender and debug and not fission: ["FAIL", "PASS"]
       if (os == "linux") and not webrender and debug and fission: ["FAIL", "PASS"]
       if (os == "linux") and not webrender and not debug: ["FAIL", "PASS"]
-      if (os == "android") and debug: ["FAIL", "PASS"]
+      if (os == "android"): ["FAIL", "PASS"]
+      if debug and (os == "mac): ["FAIL", "PASS"]
       FAIL