python311Packages.openusd: Initial support for x86_64 darwin

I had to disable OSL support as I was getting an error when trying to
link openimageio. I'm sure that this is fixable, but building this
package takes multiple hours on my macbook and I don't have the time to
dig deep into this.

pkgs/development/python-modules/openusd/default.nix

@@ -28,6 +28,7 @@
 , bison
 , qt6
 , python
+, darwin
 }:
 let
   # Matches the pyside6-uic implementation
@@ -46,6 +47,11 @@ buildPythonPackage rec {
     hash = "sha256-5zQrfB14kXs75WbL3s4eyhxELglhLNxU2L2aVXiyVjg=";
   };
 
+  stdenv = if python.stdenv.isDarwin then
+    darwin.apple_sdk_11_0.stdenv
+  else
+    python.stdenv;
+
   outputs = ["out" "doc"];
 
   format = "other";
@@ -72,9 +78,9 @@ buildPythonPackage rec {
     "-DPXR_BUILD_PYTHON_DOCUMENTATION=ON"
     "-DPXR_BUILD_EMBREE_PLUGIN=ON"
     "-DPXR_BUILD_ALEMBIC_PLUGIN=ON"
-    "-DPXR_ENABLE_OSL_SUPPORT=ON"
     "-DPXR_BUILD_DRACO_PLUGIN=ON"
     "-DPXR_BUILD_MONOLITHIC=ON" # Seems to be commonly linked to monolithically
+    (lib.cmakeBool "PXR_ENABLE_OSL_SUPPORT" (!stdenv.isDarwin))
   ];
 
   nativeBuildInputs = [
@@ -100,8 +106,12 @@ buildPythonPackage rec {
     boost
     draco
     qt6.qtbase
-    qt6.qtwayland
-  ];
+  ]
+    ++ lib.optionals stdenv.isLinux [ qt6.qtwayland ]
+    ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk_11_0.frameworks; [
+      Cocoa
+    ])
+  ;
 
   pythonImportsCheck = [ "pxr" "pxr.Usd" ];