diff --git a/backend/cpp/privacy-filter/CMakeLists.txt b/backend/cpp/privacy-filter/CMakeLists.txt
index b8580d1d4..f9ee78328 100644
--- a/backend/cpp/privacy-filter/CMakeLists.txt
+++ b/backend/cpp/privacy-filter/CMakeLists.txt
@@ -51,6 +51,14 @@ add_library(hw_grpc_proto STATIC
     ${HW_GRPC_SRCS} ${HW_GRPC_HDRS}
     ${HW_PROTO_SRCS} ${HW_PROTO_HDRS})
 target_include_directories(hw_grpc_proto PUBLIC ${CMAKE_CURRENT_BINARY_DIR})
+# The generated proto/grpc sources include protobuf and grpc++ headers, so this
+# library must see their include dirs. Linking the imported targets propagates
+# them. On Linux the apt headers live in /usr/include (default search path) so
+# this was a no-op; on macOS the Homebrew headers are under /opt/homebrew and
+# would otherwise be missed (runtime_version.h not found).
+target_link_libraries(hw_grpc_proto PUBLIC
+    protobuf::libprotobuf
+    gRPC::grpc++)
 
 # Build only the pf static lib (+ ggml) from the engine tree — no CLI/bench/tests.
 # PF_VULKAN is honored when passed on the cmake command line (it lands in the
diff --git a/scripts/build/privacy-filter-darwin.sh b/scripts/build/privacy-filter-darwin.sh
index 47b8d053b..aca901822 100644
--- a/scripts/build/privacy-filter-darwin.sh
+++ b/scripts/build/privacy-filter-darwin.sh
@@ -32,6 +32,14 @@ for file in $ADDITIONAL_LIBS; do
     cp -rfv "$file" build/darwin/lib
 done
 
+# Bundle the ggml shared libs the binary @rpath-links (libggml, -cpu, -blas,
+# -metal). The engine builds ggml shared, scattered under the build tree; flatten
+# them (with their version symlinks) into lib/, resolved at runtime by leaf name
+# via run.sh's DYLD_LIBRARY_PATH=lib. Without this the packaged binary can't find
+# libggml*.dylib once the build dir is gone.
+GGML_SRC="backend/cpp/privacy-filter/build/privacy-filter.cpp/ggml/src"
+find "$GGML_SRC" -name 'libggml*.dylib' -exec cp -a {} build/darwin/lib/ \;
+
 # Walk dylibs via otool -L and bundle anything that isn't a system framework.
 for file in build/darwin/grpc-server; do
     LIBS="$(otool -L "$file" | awk 'NR > 1 { system("echo " $1) } ' | xargs echo)"