ci: add macOS 26 target (#2937)

.github/workflows/build_and_test.yml

@@ -65,7 +65,7 @@ jobs:
     if: github.repository == 'ml-explore/mlx'
     strategy:
       matrix:
-        macos-target: ["14.0", "15.0"]
+        macos-target: ["14.0", "15.0", "26.0"]
     runs-on: [self-hosted, macos]
     env:
       MACOSX_DEPLOYMENT_TARGET: ${{ matrix.macos-target }}

.github/workflows/nightly.yml

@@ -65,6 +65,11 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
       - uses: ./.github/actions/build-macos
+      - name: Build macOS 26 package
+        uses: ./.github/actions/build-macos-release
+        with:
+          macos-target: 26.0
+          build-backend: ${{ matrix.python-version == '3.10' }}
       - name: Build macOS 15 package
         uses: ./.github/actions/build-macos-release
         with:

.github/workflows/release.yml

@@ -61,7 +61,7 @@ jobs:
           use-ccache: false
       - uses: ./.github/actions/build-linux-release
         with:
-          build-backend: ${{ matrix.python-version == '3.10' }}
+          build-backend: ${{ matrix.python_version == '3.10' }}
           arch: ${{ matrix.arch }}
       - name: Upload MLX artifacts
         uses: actions/upload-artifact@v6