diff --git a/.github/workflows/macos.yaml b/.github/workflows/macos.yaml
index e89dc88c52..1875c6f9bb 100644
--- a/.github/workflows/macos.yaml
+++ b/.github/workflows/macos.yaml
@@ -12,7 +12,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build:
+  build_arm64:
     # https://github.com/actions/virtual-environments/blob/main/images/macos/macos-11-Readme.md
     runs-on: macos-11
     timeout-minutes: 90
@@ -49,18 +49,122 @@ jobs:
       - name: Build Qt
         working-directory: ./src
         run: |
-          python3 build_tools/build_qt.py --release --confirm_license
+          python3 build_tools/build_qt.py --release --confirm_license --macos_cpus=arm64
+          echo "MOZC_QT_PATH=${PWD}/third_party/qt" >> $GITHUB_ENV
+
+      - name: bazel build
+        working-directory: ./src
+        run: |
+          bazel build --config oss_macos package --macos_cpus=arm64
+
+      - name: upload artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: Mozc.pkg(arm64)
+          path: src/bazel-bin/mac/Mozc.pkg
+          if-no-files-found: warn
+
+  build_intel64:
+    # https://github.com/actions/virtual-environments/blob/main/images/macos/macos-11-Readme.md
+    runs-on: macos-11
+    timeout-minutes: 90
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          cache: 'pip'
+          python-version: '3.9'
+
+      - name: Install pip dependencies
+        working-directory: ./src
+        run: |
+          python3 -m pip install requests
+
+      - name: Try to restore update_deps cache
+        uses: actions/cache@v3
+        with:
+          path: src/third_party_cache
+          key: update_deps-${{ runner.os }}-${{ hashFiles('src/build_tools/update_deps.py') }}
+
+      - name: Install dependencies
+        working-directory: ./src
+        # This command uses src/third_party_cache as the download cache.
+        run: |
+          python3 build_tools/update_deps.py
+
+      - name: Build Qt
+        working-directory: ./src
+        run: |
+          python3 build_tools/build_qt.py --release --confirm_license --macos_cpus=x86_64
+          echo "MOZC_QT_PATH=${PWD}/third_party/qt" >> $GITHUB_ENV
+
+      - name: bazel build
+        working-directory: ./src
+        run: |
+          bazel build --config oss_macos package --macos_cpus=x86_64
+
+      - name: upload artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: Mozc.pkg(intel64)
+          path: src/bazel-bin/mac/Mozc.pkg
+          if-no-files-found: warn
+
+  build_fat_binary:
+    # https://github.com/actions/virtual-environments/blob/main/images/macos/macos-11-Readme.md
+    runs-on: macos-11
+    timeout-minutes: 90
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          cache: 'pip'
+          python-version: '3.9'
+
+      - name: Install pip dependencies
+        working-directory: ./src
+        run: |
+          python3 -m pip install requests
+
+      - name: Try to restore update_deps cache
+        uses: actions/cache@v3
+        with:
+          path: src/third_party_cache
+          key: update_deps-${{ runner.os }}-${{ hashFiles('src/build_tools/update_deps.py') }}
+
+      - name: Install dependencies
+        working-directory: ./src
+        # This command uses src/third_party_cache as the download cache.
+        run: |
+          python3 build_tools/update_deps.py
+
+      - name: Build Qt
+        working-directory: ./src
+        run: |
+          python3 build_tools/build_qt.py --release --confirm_license --macos_cpus=x86_64,arm64
           echo "MOZC_QT_PATH=${PWD}/third_party/qt" >> $GITHUB_ENV
 
       - name: bazel build
         working-directory: ./src
         run: |
-          bazel build --config oss_macos package
+          bazel build --config oss_macos package --macos_cpus=x86_64,arm64
 
       - name: upload artifacts
         uses: actions/upload-artifact@v3
         with:
-          name: Mozc.pkg
+          name: Mozc.pkg(fat_binary)
           path: src/bazel-bin/mac/Mozc.pkg
           if-no-files-found: warn
 
diff --git a/docs/build_mozc_in_osx.md b/docs/build_mozc_in_osx.md
index 9c9c148d93..a9e570b4d5 100644
--- a/docs/build_mozc_in_osx.md
+++ b/docs/build_mozc_in_osx.md
@@ -22,12 +22,13 @@ MOZC_QT_PATH=${PWD}/third_party/qt bazel build package --config oss_macos -c opt
 open bazel-bin/mac/Mozc.pkg
 ```
 
-Hint: With the above build steps, the target CPU architecture of the binaries in
+💡 With the above build steps, the target CPU architecture of the binaries in
 `Mozc.pkg` is the same as the CPU architecture of the build environment.
 That is, if you build Mozc on arm64 environment, `Mozc.pkg` contains arm64
-binaries.
+binaries.  See the [build installer](#build-installer) section about how to do
+cross build.
 
-Hint: You can also download `Mozc.pkg` from GitHub Actions. Check [Build with GitHub Actions](#build-with-github-actions) for details.
+💡 You can also download `Mozc.pkg` from GitHub Actions. Check [Build with GitHub Actions](#build-with-github-actions) for details.
 
 ## Setup
 
@@ -110,6 +111,22 @@ MOZC_QT_PATH=${PWD}/third_party/qt bazel build package --config oss_macos -c opt
 open bazel-bin/mac/Mozc.pkg
 ```
 
+#### How to specify target CPU architectures
+
+To build arm64 binaries regardless of the host CPU architectue.
+```
+python3 build_tools/build_qt.py --release --debug --confirm_license --macos_cpus=arm64
+MOZC_QT_PATH=${PWD}/third_party/qt bazel build package --config oss_macos -c opt --macos_cpus=arm64
+open bazel-bin/mac/Mozc.pkg
+```
+
+To build fat binaries for both arm64 and x86_64.
+```
+python3 build_tools/build_qt.py --release --debug --confirm_license --macos_cpus=x86_64,arm64
+MOZC_QT_PATH=${PWD}/third_party/qt bazel build package --config oss_macos -c opt --macos_cpus=x86_64,arm64
+open bazel-bin/mac/Mozc.pkg
+```
+
 ### Unit tests
 
 ```