diff --git a/cidre/pomace/sc/sc.h b/cidre/pomace/sc/sc.h
index ead70120..f663535c 100644
--- a/cidre/pomace/sc/sc.h
+++ b/cidre/pomace/sc/sc.h
@@ -21,11 +21,15 @@ static void mtl_initializer(void)
 {
   static int initialized = 0;
   if (!initialized) {
-    SC_STREAM_CONFIGURATION = [SCStreamConfiguration class];
-    SC_CONTENT_FILTER = [SCContentFilter class];
-    SC_STREAM = [SCStream class];
-    SC_SHAREABLE_CONTENT = [SCShareableContent class];
-    
+    if (@available(macOS 12.3, *)) {
+      SC_STREAM_CONFIGURATION = [SCStreamConfiguration class];
+      SC_CONTENT_FILTER = [SCContentFilter class];
+      SC_STREAM = [SCStream class];
+      SC_SHAREABLE_CONTENT = [SCShareableContent class];
+    } else {
+      // Fallback on earlier versions
+    }
+
     initialized = 1;
   }
 }
diff --git a/cidre/src/ca.rs b/cidre/src/ca.rs
index b2a93484..75b64a99 100644
--- a/cidre/src/ca.rs
+++ b/cidre/src/ca.rs
@@ -36,3 +36,7 @@ pub use layer::Layer;
 mod metal_layer;
 pub use metal_layer::MetalDrawable;
 pub use metal_layer::MetalLayer;
+
+mod renderer;
+pub use renderer::OptionKey as RendererOptionKey;
+pub use renderer::Renderer;
diff --git a/cidre/src/ca/renderer.rs b/cidre/src/ca/renderer.rs
index 5c8434b6..5f40478f 100644
--- a/cidre/src/ca/renderer.rs
+++ b/cidre/src/ca/renderer.rs
@@ -1,20 +1,33 @@
 use crate::{arc, cf, cv, define_cls, define_obj_type, ns, objc};
 
-define_obj_type!(Renderer(ns::Id));
+define_obj_type!(OptionKey(ns::String));
+
+impl OptionKey {
+    #[inline]
+    pub fn color_space() -> &'static Self {
+        unsafe { kCARendererColorSpace }
+    }
+
+    #[inline]
+    pub fn metal_cmd_queue() -> &'static Self {
+        unsafe { kCARendererMetalCommandQueue }
+    }
+}
 
+define_obj_type!(Renderer(ns::Id));
 impl Renderer {
     define_cls!(CA_RENDERER);
 
     #[objc::cls_msg_send(rendererWithMTLTexture:options:)]
     pub fn with_mtl_texture_ar(
         texture: &mtl::Texture,
-        options: Option<&ns::Dictionary<ns::String, ns::Id>>,
+        options: Option<&ns::Dictionary<OptionKey, ns::Id>>,
     ) -> &'ar Self;
 
     #[objc::rar_retain]
     pub fn with_mtl_texture(
         texture: &mtl::Texture,
-        options: Option<&ns::Dictionary<ns::String, ns::Id>>,
+        options: Option<&ns::Dictionary<OptionKey, ns::Id>>,
     ) -> arc::R<Self>;
 
     #[objc::msg_send(layer)]
@@ -56,3 +69,8 @@ impl Renderer {
 extern "C" {
     static CA_RENDERER: &'static objc::Class<Renderer>;
 }
+
+extern "C" {
+    static kCARendererColorSpace: &'static OptionKey;
+    static kCARendererMetalCommandQueue: &'static OptionKey;
+}