OSX: satisfy macro to also apply alembic tests

Referenced by issue #51295, Blender cant find folders with ~ at the end

build_files/cmake/platform/platform_apple.cmake

@@ -23,6 +23,10 @@
 
 # Libraries configuration for Apple.
 
+macro(find_package_wrapper)
+# do nothing, just satisfy the macro
+endmacro()
+
 if(NOT DEFINED LIBDIR)
 	if(WITH_CXX11)
 		set(LIBDIR ${CMAKE_SOURCE_DIR}/../lib/darwin)
@@ -52,6 +56,7 @@ if(WITH_ALEMBIC)
 	set(ALEMBIC_INCLUDE_DIRS ${ALEMBIC_INCLUDE_DIR})
 	set(ALEMBIC_LIBPATH ${ALEMBIC}/lib)
 	set(ALEMBIC_LIBRARIES Alembic)
+	set(ALEMBIC_FOUND ON)
 endif()
 
 if(WITH_OPENSUBDIV OR WITH_CYCLES_OPENSUBDIV)

tests/python/CMakeLists.txt

@@ -443,7 +443,7 @@ if(WITH_CYCLES)
 	endif()
 endif()
 
-if(WITH_ALEMBIC AND NOT APPLE)
+if(WITH_ALEMBIC)
 	find_package_wrapper(Alembic)
 	if(NOT ALEMBIC_FOUND)
 		message(FATAL_ERROR "Alembic is enabled but cannot be found")