diff --git a/webrtc/video/full_stack_tests.cc b/webrtc/video/full_stack_tests.cc
index 8299771379..3e5781688e 100644
--- a/webrtc/video/full_stack_tests.cc
+++ b/webrtc/video/full_stack_tests.cc
@@ -465,7 +465,8 @@ TEST_F(FullStackTest, VP9SVC_3SL_Low) {
 #endif  // !defined(RTC_DISABLE_VP9)
 
 // Android bots can't handle FullHD, so disable the test.
-#if defined(WEBRTC_ANDROID)
+// Test is not working correctly on Mac: webrtc:7870.
+#if defined(WEBRTC_ANDROID) || defined(WEBRTC_MAC)
 #define MAYBE_SimulcastFullHdOveruse DISABLED_SimulcastFullHdOveruse
 #else
 #define MAYBE_SimulcastFullHdOveruse SimulcastFullHdOveruse