Fix GH MacOS build.

.github/workflows/main.yml

@@ -291,10 +291,20 @@ jobs:
         run: |
           brew install automake autoconf-archive cmake libtool ninja
 
+      # libcxx build is not working with python >= 3.12
+      - name: Do not use preinstalled python >= 3.12
+        if: ${{ matrix.arch == 'x64' }}
+        run: |
+          brew uninstall --ignore-dependencies python@3.12
+          [ -e /Library/Frameworks/Python.framework ] && \
+            sudo mv /Library/Frameworks/Python.framework /Library/Frameworks/Python.framework.dont-look-at-this
+          brew install python@3.11
+          ln -s "$(brew --prefix python@3.11)/bin/python3" "$(brew --prefix python@3.11)/bin/python"
+
       - name: Cache - vcpkg
         uses: actions/cache@v4
         with:
-          key: ${{ runner.os }}-vcpkg
+          key: ${{ runner.os }}-vcpkg-0
           path: |
             $HOME/.cache/vcpkg/archives
 
@@ -302,6 +312,7 @@ jobs:
         run: |
           export LIBTOOLIZE=glibtoolize
           export LIBTOOL=glibtool
+          export PATH="$(brew --prefix python@3.11)/bin:$PATH"
 
           ./autogen.sh --with-builtin-tommath --with-builtin-tomcrypt
           make -j4