diff --git a/rEFIt_UEFI/entry_scan/loader.cpp b/rEFIt_UEFI/entry_scan/loader.cpp
index 6e57fca99..977821305 100644
--- a/rEFIt_UEFI/entry_scan/loader.cpp
+++ b/rEFIt_UEFI/entry_scan/loader.cpp
@@ -578,9 +578,9 @@ MacOsVersion GetOSVersion(int LoaderType, const XStringW& APFSTargetUUID, const
             if ( !Prop->isString() ) {
               MsgLog("ATTENTION : property not string in Kernel Flags\n");
             }else{
-              if ( Prop->getString()->stringValue().contains("Install%20macOS%20BigSur") || Prop->getString()->stringValue().contains("Install%20macOS%2011.0")) {
+              if ( Prop->getString()->stringValue().contains("Install%20macOS%20BigSur") || Prop->getString()->stringValue().contains("Install%20macOS%2011")) {
                 OSVersion = "11"_XS8;
-              } else if ( Prop->getString()->stringValue().contains("Install%20macOS%2012.0")) {
+              } else if ( Prop->getString()->stringValue().contains("Install%20macOS%20Monterey") || Prop->getString()->stringValue().contains("Install%20macOS%2012")) {
                 OSVersion = "12"_XS8;
               } else if ( Prop->getString()->stringValue().contains("Install%20macOS%2010.16")) {
                 OSVersion = "10.16"_XS8;