Try cross-compiling

.github/workflows/upload_binary.yml

@@ -11,7 +11,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: [3.7]
-        os: [windows-2019, ubuntu-20.04, macos-latest]
+        os: [windows-2019, ubuntu-20.04, macos-11.0]
         include:
           - os: windows-2019
             pathsep: ";"
@@ -21,11 +21,12 @@ jobs:
             pathsep: ":"
             executable_suffix: ".elf"
             executable_mime: "application/x-executable"
-
-          - os: macos-latest
+          - os: macos-11.0
             pathsep: ":"
             executable_suffix: ""
             executable_mime: "application/x-mach-binary"
+            env:
+              CFLAGS: "-arch arm64 -arch x86_64"
 
     steps:
       - uses: actions/checkout@v2
@@ -39,7 +40,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip wheel setuptools
           python -m pip install .
-          python -m pip install pyinstaller
+          python -m pip install https://github.com/rokm/pyinstaller/archive/macos11-arm-support.zip
 
       - name: Build binary
         run: |