diff --git a/extras/Projucer/Source/Project/Modules/jucer_Modules.cpp b/extras/Projucer/Source/Project/Modules/jucer_Modules.cpp
index ebc0bcdccb..a62f187564 100644
--- a/extras/Projucer/Source/Project/Modules/jucer_Modules.cpp
+++ b/extras/Projucer/Source/Project/Modules/jucer_Modules.cpp
@@ -315,7 +315,7 @@ Array<LibraryModule::CompileUnit> LibraryModule::getAllCompileUnits (build_tools
     for (auto& cu : units)
     {
         cu.isCompiledForObjC = true;
-        cu.isCompiledForNonObjC = ! cu.file.hasFileExtension ("mm;m");
+        cu.isCompiledForNonObjC = ! cu.file.hasFileExtension ("mm;m;metal");
 
         if (cu.isCompiledForNonObjC)
             if (cu.file.withFileExtension ("mm").existsAsFile())
diff --git a/extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Xcode.h b/extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Xcode.h
index ca426bc04f..9e743416b1 100644
--- a/extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Xcode.h
+++ b/extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Xcode.h
@@ -1373,6 +1373,9 @@ public:
             }
 
             StringArray headerPaths (getHeaderSearchPaths (config));
+
+            s.set ("MTL_HEADER_SEARCH_PATHS", indentParenthesisedList (headerPaths, 1));
+
             headerPaths.add ("\"$(inherited)\"");
             s.set ("HEADER_SEARCH_PATHS", indentParenthesisedList (headerPaths, 1));
             s.set ("USE_HEADERMAP", String (static_cast<bool> (config.exporter.settings.getProperty ("useHeaderMap")) ? "YES" : "NO"));
diff --git a/extras/Projucer/Source/Utility/Helpers/jucer_FileHelpers.h b/extras/Projucer/Source/Utility/Helpers/jucer_FileHelpers.h
index 8be45fc77c..6c69bf5af6 100644
--- a/extras/Projucer/Source/Utility/Helpers/jucer_FileHelpers.h
+++ b/extras/Projucer/Source/Utility/Helpers/jucer_FileHelpers.h
@@ -39,15 +39,15 @@ namespace FileHelpers
 }
 
 //==============================================================================
-const char* const sourceFileExtensions          = "cpp;mm;m;c;cc;cxx;swift;s;asm;r";
+const char* const sourceFileExtensions          = "cpp;mm;m;metal;c;cc;cxx;swift;s;asm;r";
 const char* const headerFileExtensions          = "h;hpp;hxx;hh;inl";
 const char* const cOrCppFileExtensions          = "cpp;cc;cxx;c";
 const char* const cppFileExtensions             = "cpp;cc;cxx";
 const char* const objCFileExtensions            = "mm;m";
 const char* const asmFileExtensions             = "s;S;asm";
-const char* const sourceOrHeaderFileExtensions  = "cpp;mm;m;c;cc;cxx;swift;s;S;asm;h;hpp;hxx;hh;inl";
-const char* const browseableFileExtensions      = "cpp;mm;m;c;cc;cxx;swift;s;S;asm;h;hpp;hxx;hh;inl;txt;md;rtf";
-const char* const fileTypesToCompileByDefault   = "cpp;mm;c;m;cc;cxx;swift;s;S;asm;r";
+const char* const sourceOrHeaderFileExtensions  = "cpp;mm;m;metal;c;cc;cxx;swift;s;S;asm;h;hpp;hxx;hh;inl";
+const char* const browseableFileExtensions      = "cpp;mm;m;metal;c;cc;cxx;swift;s;S;asm;h;hpp;hxx;hh;inl;txt;md;rtf";
+const char* const fileTypesToCompileByDefault   = "cpp;mm;m;metal;c;cc;cxx;swift;s;S;asm;r";
 
 //==============================================================================
 struct FileModificationDetector