Use gcc 14 xcode

.github/workflows/macos.yml

@@ -12,14 +12,14 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        compiler: [g++-13]
+        compiler: [g++-14]
         buildmode: [Debug]
     steps:
       - uses: actions/checkout@v4
 
       - uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: latest-stable
+          xcode-version: 15.4
 
       - name: Install dependencies
         run: |