diff --git a/.github/workflows/build_and_release.yml b/.github/workflows/build_and_release.yml
index 2d87942..e07ed24 100644
--- a/.github/workflows/build_and_release.yml
+++ b/.github/workflows/build_and_release.yml
@@ -59,10 +59,12 @@ jobs:
       matrix:
         platform:
           # Use the oldest version possible to maximize compatibility
-          - runner: macos-12
-            target: macosx_12_0_x86_64
-          - runner: macos-14
-            target: macosx_14_0_arm64
+          - runner: macos-13
+            target: macosx_10_12_x86_64
+            target_env: 10.12
+          - runner: macos-15
+            target: macosx_11_0_arm64
+            target_env: 11.0
     steps:
       - uses: actions/checkout@v4
       - name: Install dependencies
@@ -75,7 +77,7 @@ jobs:
           brew install gnu-sed
       - name: Build app
         run: |
-          bash build_reduce.sh ${{ inputs.reduce-release-tag }}
+          MACOSX_DEPLOYMENT_TARGET=${{ matrix.platform.target_env }} bash build_reduce.sh ${{ inputs.reduce-release-tag }}
       - name: Build python wheel
         run: |
           export PATH="/Users/runner/.local/bin:$PATH"
diff --git a/README.md b/README.md
index c88de10..26ef546 100644
--- a/README.md
+++ b/README.md
@@ -52,13 +52,20 @@ uv tool install build
 brew install gnu-sed
 ```
 
-Build the app (reduce):
+Build the app at `buiid/` (reduce):
 
 ```bash
-# build/
+# Linux
 bash build_reduce.sh v4.14
+# Mac (Intel)
+MACOSX_DEPLOYMENT_TARGET=10.12 bash build_reduce.sh v4.14
+# Mac (Apple Silicon)
+MACOSX_DEPLOYMENT_TARGET=11.0 bash build_reduce.sh v4.14
 ```
 
+The `MACOSX_DEPLOYMENT_TARGET` is the cmake flag.  
+<https://cmake.org/cmake/help/latest/envvar/MACOSX_DEPLOYMENT_TARGET.html>
+
 Build the wheel. It copies the `python` to `build_python/`, built binary into it, modifies the version number and builds the wheel in `build_python/dist/`.:
 
 ```bash
diff --git a/build_python.sh b/build_python.sh
index 8fb9aa8..e1ec236 100755
--- a/build_python.sh
+++ b/build_python.sh
@@ -29,10 +29,6 @@ elif [[ $# -eq 3 ]]; then
 
     valid_platforms=("macosx_11_0_arm64" \
         "macosx_10_12_x86_64" \
-        "macosx_12_0_x86_64" \
-        "macosx_13_0_x86_64" \
-        "macosx_14_0_arm64" \
-        "macosx_15_0_arm64" \
         "manylinux_2_17_x86_64.manylinux2014_x86_64" \
         "manylinux_2_28_x86_64" \
         "manylinux_2_17_i686.manylinux2014_i686" "manylinux_2_17_aarch64.manylinux2014_aarch64" \