Switch to statically linked OCCTWrapper on Apple.

Due to dmg notarization issues

src/libslic3r/CMakeLists.txt

@@ -414,6 +414,11 @@ target_link_libraries(libslic3r
     qoi
     )
 
+if (APPLE)
+    # TODO: we need to fix notarization with the separate shared library
+    target_link_libraries(libslic3r OCCTWrapper)
+endif ()
+
 if (TARGET OpenVDB::openvdb)
     target_link_libraries(libslic3r OpenVDB::openvdb)
 endif()

src/libslic3r/Format/STEP.cpp

@@ -21,6 +21,10 @@
 
 namespace Slic3r {
 
+#if __APPLE__
+extern "C" bool load_step_internal(const char *path, OCCTResult* res);
+#endif
+
 LoadStepFn get_load_step_fn()
 {
     static LoadStepFn load_step_fn = nullptr;
@@ -47,6 +51,8 @@ LoadStepFn get_load_step_fn()
             FreeLibrary(module);
             throw;
         }
+#elif __APPLE__
+        load_step_fn = &load_step_internal;
 #else
         libpath /= "OCCTWrapper.so";
         void *plugin_ptr = dlopen(libpath.c_str(), RTLD_NOW | RTLD_GLOBAL);

src/occt_wrapper/CMakeLists.txt

@@ -1,7 +1,12 @@
 cmake_minimum_required(VERSION 3.13)
 project(OCCTWrapper)
 
-add_library(OCCTWrapper MODULE OCCTWrapper.cpp)
+if (APPLE)
+    # TODO: we need to fix notarization with the separate shared library
+    add_library(OCCTWrapper STATIC OCCTWrapper.cpp)
+else ()
+    add_library(OCCTWrapper MODULE OCCTWrapper.cpp)
+endif ()
 
 set_target_properties(OCCTWrapper
     PROPERTIES