diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5877ee41..d80f3bba 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -161,8 +161,13 @@ jobs:
              echo "pip=$pip" >> $GITHUB_ENV
              echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH" >> $GITHUB_ENV
              echo -e "Python: $python\nPip: $pip\nLD_LIB...: $LD_LIBRARY_PATH"
-             $pip install --upgrade pip
-             $pip install wheel
+             if [ $GAMOS == "macos" ]; then
+               export pipoptions='--nobnary ":all:"'
+               export MACOSX_DEPLOYMENT_TARGET="10.9"
+               export CFLAGS="-arch arm64 -arch x86_64"
+             fi
+             $pip install --upgrade pip $pipoptions
+             $pip install wheel $pipoptions
              export url="https://codeload.github.com/pyinstaller/pyinstaller/tar.gz/${PYINSTALLER_VERSION}"
              echo "Downloading ${url}"
              curl -o pyinstaller.tar.gz --compressed "${url}"
@@ -180,7 +185,11 @@ jobs:
                $python ./waf all $TARGETARCH
                cd ..
              fi
-             $pip install .
+             if [ $GAMOS == "macos" ]; then
+               $pip install pyinstaller $pipoptions
+             else
+               $pip install .
+             fi
              #$python setup.py install
              #$pip install pyinstaller
 
@@ -188,9 +197,13 @@ jobs:
         if: matrix.os != 'self-hosted'
         run: |
              set +e
-             $pip list --outdated --format=freeze | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 $pip install -U --force-reinstall
-
-             $pip install --upgrade -r requirements.txt
+             if [ $GAMOS == "macos" ]; then
+               export pipoptions='--nobnary ":all:"'
+               export MACOSX_DEPLOYMENT_TARGET="10.9"
+               export CFLAGS="-arch arm64 -arch x86_64"
+             fi
+             $pip list --outdated --format=freeze | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 $pip install -U --force-reinstall $pipoptions
+             $pip install --upgrade -r requirements.txt $pipoptions
 
       - name: Build GAM with PyInstaller
         if: matrix.goal != 'test'