diff --git a/mozilla/webtools/bugzilla/.bzrrev b/mozilla/webtools/bugzilla/.bzrrev
index a590294c19d..b5c5971d6a9 100644
--- a/mozilla/webtools/bugzilla/.bzrrev
+++ b/mozilla/webtools/bugzilla/.bzrrev
@@ -1 +1 @@
-8311
\ No newline at end of file
+8312
\ No newline at end of file
diff --git a/mozilla/webtools/bugzilla/Bugzilla/UserAgent.pm b/mozilla/webtools/bugzilla/Bugzilla/UserAgent.pm
index 7071a37b63b..b5d55213053 100644
--- a/mozilla/webtools/bugzilla/Bugzilla/UserAgent.pm
+++ b/mozilla/webtools/bugzilla/Bugzilla/UserAgent.pm
@@ -117,6 +117,7 @@ use constant OS_MAP => (
     qr/\(.*Win(?:dows[ -]|)NT.*\)/ => ["Windows NT"],
     qr/\(.*Windows.*NT.*\)/ => ["Windows NT"],
     # OS X
+    qr/\(.*Mac OS X (?:|Mach-O |\()10.8.*\)/ => ["Mac OS X 10.8"],
     qr/\(.*Mac OS X (?:|Mach-O |\()10.7.*\)/ => ["Mac OS X 10.7"],
     qr/\(.*Mac OS X (?:|Mach-O |\()10.6.*\)/ => ["Mac OS X 10.6"],
     qr/\(.*Mac OS X (?:|Mach-O |\()10.5.*\)/ => ["Mac OS X 10.5"],