diff --git a/glfw/cocoa_monitor.m b/glfw/cocoa_monitor.m
index 1117ededa..6911aa090 100644
--- a/glfw/cocoa_monitor.m
+++ b/glfw/cocoa_monitor.m
@@ -61,7 +61,7 @@ getDisplayName(CGDirectDisplayID displayID, NSScreen* screen)
     io_service_t service;
     CFDictionaryRef info;
 
-    if (IOServiceGetMatchingServices(kIOMainPortDefault,
+    if (IOServiceGetMatchingServices(NULL,
                                      IOServiceMatching("IODisplayConnect"),
                                      &it) != 0)
     {
@@ -259,7 +259,7 @@ static double getFallbackRefreshRate(CGDirectDisplayID displayID)
     io_iterator_t it;
     io_service_t service;
 
-    if (IOServiceGetMatchingServices(kIOMainPortDefault,
+    if (IOServiceGetMatchingServices(NULL,
                                      IOServiceMatching("IOFramebuffer"),
                                      &it) != 0)
     {
diff --git a/glfw/cocoa_platform.h b/glfw/cocoa_platform.h
index 8f6d7a2cf..faf3ad20d 100644
--- a/glfw/cocoa_platform.h
+++ b/glfw/cocoa_platform.h
@@ -39,9 +39,6 @@ typedef void* CVDisplayLinkRef;
 // NOTE: Many Cocoa enum values have been renamed and we need to build across
 //       SDK versions where one is unavailable or the other deprecated
 //       We use the newer names in code and these macros to handle compatibility
-#if (MAC_OS_X_VERSION_MAX_ALLOWED < 120000) // Before macOS 12 Monterey
-  #define kIOMainPortDefault kIOMasterPortDefault
-#endif
 #if MAC_OS_X_VERSION_MAX_ALLOWED < 101200
  #define NSBitmapFormatAlphaNonpremultiplied NSAlphaNonpremultipliedBitmapFormat
  #define NSEventMaskAny NSAnyEventMask