diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0bac5282a..7a7aa06ca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -49,7 +49,16 @@ option(BUILD_SHARED_LIBS "Build opencc as shared library" ${_OPENCC_DEFAULT_BUIL
 option(OPENCC_ENABLE_INSTALL "Generate install targets" ${_OPENCC_DEFAULT_ENABLE_INSTALL})
 option(ENABLE_GTEST "Build all tests." OFF)
 option(ENABLE_BENCHMARK "Build benchmark tests." OFF)
-option(BUILD_OPENCC_JIEBA_PLUGIN "Build Jieba segmentation as a loadable plugin." OFF)
+# Top-level macOS builds enable the Jieba plugin by default so package
+# managers that build with default options (e.g. Homebrew) ship it. Other
+# platforms and subproject builds (FetchContent / add_subdirectory) keep it
+# opt-in.
+if (APPLE AND CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+  set(OPENCC_JIEBA_PLUGIN_DEFAULT ON)
+else()
+  set(OPENCC_JIEBA_PLUGIN_DEFAULT OFF)
+endif()
+option(BUILD_OPENCC_JIEBA_PLUGIN "Build Jieba segmentation as a loadable plugin." ${OPENCC_JIEBA_PLUGIN_DEFAULT})
 option(BUILD_PYTHON "Build python library" OFF)
 
 # Built-in dictionaries and configs can be produced as compiled ocd2
diff --git a/NEWS.md b/NEWS.md
index 7e151339d..a4f776f3f 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -28,6 +28,7 @@
     * Node 預編譯二進制（`@opencc/opencc-*` scoped 套件）改用 Bazel 構建發佈，`npm run prebuild`（prebuildify / node-gyp）不再是官方發佈二進制的構建方式；Bazel 不支援的平台從此不再提供官方預編譯二進制，在這些平台上 `npm install` 目前仍會退回 node-gyp 源碼編譯，但此 fallback（`binding.gyp`）已計劃在後續版本中移除，屆時 Node 構建將統一使用 Bazel（[#1416](https://github.com/BYVoid/OpenCC/pull/1416)）。
     * 重寫 Node demo 範例（[commit](https://github.com/BYVoid/OpenCC/commit/6b382c6489efe4874350ec33531b46b32e08c2d5)）。
 * **打包 / 構建系統**：
+    * macOS 頂層 CMake 構建現在預設啟用 jieba 插件（`BUILD_OPENCC_JIEBA_PLUGIN=ON`），Homebrew 等以預設選項構建的套件管理器將直接提供 `opencc-jieba` 插件與 `*_jieba.json` 配置；其他平台與以子項目方式（FetchContent / `add_subdirectory`）引入的構建維持預設關閉，Python wheel 構建亦顯式關閉。
     * 重建 Debian 打包流程：新增頂層 `debian/` 目錄使 `dpkg-buildpackage` 可端到端重現 Debian 構建，`packaging/debian/` 補丁鏡像與 ver.1.4.0 源碼對齊，並改進 deb 構建腳本與 workflow（[#1398](https://github.com/BYVoid/OpenCC/pull/1398), [#1385](https://github.com/BYVoid/OpenCC/pull/1385), [#1406](https://github.com/BYVoid/OpenCC/pull/1406)）。
     * Bazel 升級至 9.1.1（[#1384](https://github.com/BYVoid/OpenCC/pull/1384)）；`rules_node_addon` 更新至 BCR 1.0.3（[#1370](https://github.com/BYVoid/OpenCC/pull/1370)）。
     * MSVC `/W4` 改用 `add_compile_options` 設定，避免 `rc.exe` 資源編譯失敗（[#1393](https://github.com/BYVoid/OpenCC/pull/1393)）；CMake 恢復支援舊式 Python executable 選項（[#1389](https://github.com/BYVoid/OpenCC/pull/1389)）。
diff --git a/setup.py b/setup.py
index 55bdab25b..d5b35581e 100644
--- a/setup.py
+++ b/setup.py
@@ -111,6 +111,7 @@ def build_libopencc(output_path):
         '-DBUILD_SHARED_LIBS:BOOL=OFF',
         '-DENABLE_GTEST:BOOL=OFF',
         '-DENABLE_BENCHMARK:BOOL=OFF',
+        '-DBUILD_OPENCC_JIEBA_PLUGIN:BOOL=OFF',
         '-DBUILD_PYTHON:BOOL=ON',
         '-DCMAKE_BUILD_TYPE=Release',
         '-DCMAKE_INSTALL_PREFIX={}'.format(output_path),