diff --git a/modules/audio_device/mac/audio_device_mac.h b/modules/audio_device/mac/audio_device_mac.h
index bb06395d03..e1afd74843 100644
--- a/modules/audio_device/mac/audio_device_mac.h
+++ b/modules/audio_device/mac/audio_device_mac.h
@@ -282,10 +282,8 @@ class AudioDeviceMac : public AudioDeviceGeneric {
   uint16_t _outputDeviceIndex;
   AudioDeviceID _inputDeviceID;
   AudioDeviceID _outputDeviceID;
-#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 1050
   AudioDeviceIOProcID _inDeviceIOProcID;
   AudioDeviceIOProcID _deviceIOProcID;
-#endif
   bool _inputDeviceIsSpecified;
   bool _outputDeviceIsSpecified;
 
diff --git a/modules/desktop_capture/mac/desktop_configuration.mm b/modules/desktop_capture/mac/desktop_configuration.mm
index 93fb3f6226..eeb035f2b0 100644
--- a/modules/desktop_capture/mac/desktop_configuration.mm
+++ b/modules/desktop_capture/mac/desktop_configuration.mm
@@ -16,16 +16,6 @@
 
 #include "rtc_base/checks.h"
 
-#if !defined(MAC_OS_X_VERSION_10_7) || \
-    MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_7
-
-@interface NSScreen (LionAPI)
-- (CGFloat)backingScaleFactor;
-- (NSRect)convertRectToBacking:(NSRect)aRect;
-@end
-
-#endif  // MAC_OS_X_VERSION_10_7
-
 namespace webrtc {
 
 namespace {
@@ -60,16 +50,9 @@ MacDisplayConfiguration GetConfigurationForScreen(NSScreen* screen) {
   NSRect ns_bounds = [screen frame];
   display_config.bounds = NSRectToDesktopRect(ns_bounds);
 
-  // If the host is running Mac OS X 10.7+ or later, query the scaling factor
-  // between logical and physical (aka "backing") pixels, otherwise assume 1:1.
-  if ([screen respondsToSelector:@selector(backingScaleFactor)] &&
-      [screen respondsToSelector:@selector(convertRectToBacking:)]) {
-    display_config.dip_to_pixel_scale = [screen backingScaleFactor];
-    NSRect ns_pixel_bounds = [screen convertRectToBacking: ns_bounds];
-    display_config.pixel_bounds = NSRectToDesktopRect(ns_pixel_bounds);
-  } else {
-    display_config.pixel_bounds = display_config.bounds;
-  }
+  display_config.dip_to_pixel_scale = [screen backingScaleFactor];
+  NSRect ns_pixel_bounds = [screen convertRectToBacking:ns_bounds];
+  display_config.pixel_bounds = NSRectToDesktopRect(ns_pixel_bounds);
 
   // Determine if the display is built-in or external.
   display_config.is_builtin = CGDisplayIsBuiltin(display_config.id);