added first mac workflow

a first test...

.github/workflows/build-project-mac.yml

@@ -6,7 +6,7 @@ on:
     
 jobs:
   build_linux_release:
-    name: Build Linux release
+    name: Build macOS release
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
@@ -29,7 +29,7 @@ jobs:
                 
         
           
-      - name: Install Linux dependencies
+      - name: Install macOS dependencies
         if: matrix.os == 'macos-10.15'
         run: |
           python -m pip install --upgrade pip
@@ -44,7 +44,6 @@ jobs:
       - name: Install Portaudio
         if: matrix.os == 'macos-10.15'
         run: |
-            xcode-select --install
             brew remove portaudio
             brew install portaudio
             pip3 install pyaudio