diff --git a/OpenCorePkg b/OpenCorePkg
index 704c042bd..b0aac62ac 160000
--- a/OpenCorePkg
+++ b/OpenCorePkg
@@ -1 +1 @@
-Subproject commit 704c042bdb9be1e14d207276403127b7b46f4007
+Subproject commit b0aac62accc46de3297b2fa3b50e34f0d03460bd
diff --git a/rEFIt_UEFI/entry_scan/loader.cpp b/rEFIt_UEFI/entry_scan/loader.cpp
index c219e16ad..6e57fca99 100644
--- a/rEFIt_UEFI/entry_scan/loader.cpp
+++ b/rEFIt_UEFI/entry_scan/loader.cpp
@@ -580,6 +580,8 @@ MacOsVersion GetOSVersion(int LoaderType, const XStringW& APFSTargetUUID, const
             }else{
               if ( Prop->getString()->stringValue().contains("Install%20macOS%20BigSur") || Prop->getString()->stringValue().contains("Install%20macOS%2011.0")) {
                 OSVersion = "11"_XS8;
+              } else if ( Prop->getString()->stringValue().contains("Install%20macOS%2012.0")) {
+                OSVersion = "12"_XS8;
               } else if ( Prop->getString()->stringValue().contains("Install%20macOS%2010.16")) {
                 OSVersion = "10.16"_XS8;
               } else if ( Prop->getString()->stringValue().contains("Install%20macOS%20Catalina") || Prop->getString()->stringValue().contains("Install%20macOS%2010.15")) {
@@ -831,12 +833,15 @@ GetOSIconName (const MacOsVersion& OSVersion)
   XStringW OSIconName;
   if (OSVersion.isEmpty()) {
     OSIconName = L"mac"_XSW;
+  } else if (OSVersion.elementAt(0) == 12 ){
+    // Monterey
+    OSIconName = L"monterey,mac"_XSW;
   } else if ( (OSVersion.elementAt(0) == 10 && OSVersion.elementAt(1) == 16 ) ||
               (OSVersion.elementAt(0) == 11 /*&& OSVersion.elementAt(1) == 0*/ )
             ) {
     // Big Sur
     OSIconName = L"bigsur,mac"_XSW;
-  }else if ( OSVersion.elementAt(0) == 10 ) {
+  } else if ( OSVersion.elementAt(0) == 10 ) {
     if ( OSVersion.elementAt(1) == 15 ) {
       // Catalina
       OSIconName = L"cata,mac"_XSW;
diff --git a/rEFIt_UEFI/libeg/XIcon.cpp b/rEFIt_UEFI/libeg/XIcon.cpp
index 39f9a0bd8..3b62dd778 100644
--- a/rEFIt_UEFI/libeg/XIcon.cpp
+++ b/rEFIt_UEFI/libeg/XIcon.cpp
@@ -83,6 +83,7 @@ CONST CHAR8* IconsNames[] = {
    "os_clover",  //52 == ICON_CLOVER
    //other oses will be added below
    "os_bigsur",  //53 == ICON_BIGSUR
+   "os_monterey",  //54 == ICON_MONTEREY
   ""
 };
 const INTN IconsNamesSize = sizeof(IconsNames) / sizeof(IconsNames[0]);
diff --git a/rEFIt_UEFI/refit/lib.h b/rEFIt_UEFI/refit/lib.h
index 8c3369b59..0e9b4eb61 100644
--- a/rEFIt_UEFI/refit/lib.h
+++ b/rEFIt_UEFI/refit/lib.h
@@ -361,6 +361,7 @@ void DebugPause(void);
 #define ICON_OTHER_OS                          (51)
 #define ICON_CLOVER                            (52)
 #define ICON_BIGSUR                            (53)
+#define ICON_MONTEREY                          (54)
 #define BUILTIN_ICON_BACKGROUND                (100)
 #define BUILTIN_ICON_SELECTION                 (101)
 #define BUILTIN_ICON_ANIME                     (102)
diff --git a/rEFIt_UEFI/refit/main.cpp b/rEFIt_UEFI/refit/main.cpp
index 0a0131e44..983a4245d 100644
--- a/rEFIt_UEFI/refit/main.cpp
+++ b/rEFIt_UEFI/refit/main.cpp
@@ -1340,8 +1340,13 @@ void LOADER_ENTRY::StartLoader()
         */
   //      InstallerVersion = SearchString((CHAR8*)LoadedImage->ImageBase, LoadedImage->ImageSize, "Mac OS X ", 9);
         InstallerVersion = AsciiStrStr((CHAR8*)LoadedImage->ImageBase, "Mac OS X ");
+        int location = 9;
+        if (InstallerVersion == NULL) {
+          InstallerVersion = AsciiStrStr((CHAR8*)LoadedImage->ImageBase, "macOS ");
+          location = 7;
+        }
         if (InstallerVersion != NULL) { // string was found
-          InstallerVersion += 9; // advance to version location
+          InstallerVersion += location; // advance to version location
 
           if (strncmp(InstallerVersion, "10.7", 4) &&
               strncmp(InstallerVersion, "10.8", 4) &&
@@ -1353,7 +1358,8 @@ void LOADER_ENTRY::StartLoader()
               strncmp(InstallerVersion, "10.14", 5) &&
               strncmp(InstallerVersion, "10.15", 5) &&
               strncmp(InstallerVersion, "10.16", 5) &&
-              strncmp(InstallerVersion, "11.", 3)) {
+              strncmp(InstallerVersion, "11.", 3) &&
+              strncmp(InstallerVersion, "12.", 3)) {
             InstallerVersion = NULL; // flag known version was not found
           }
           if (InstallerVersion != NULL) { // known version was found in image