diff --git a/.github/workflows/abismal_build_macos.yml b/.github/workflows/abismal_build_macos.yml
index 116a2e6..b91b69d 100644
--- a/.github/workflows/abismal_build_macos.yml
+++ b/.github/workflows/abismal_build_macos.yml
@@ -8,24 +8,24 @@ on:
     branches: [ "master" ]
 
 jobs:
-  # build-on-x86:
-  #   runs-on: macos-13
-  #   steps:
-  #   - uses: actions/checkout@v4
-  #     with:
-  #       submodules: recursive
-  #   - name: Update Homebrew
-  #     run: brew update
-  #   - name: Install automake
-  #     run: brew install automake
-  #   - name: Install dependencies
-  #     run: brew install htslib
-  #   - name: Generate configure script
-  #     run: ./autogen.sh
-  #   - name: configure with g++-14
-  #     run: ./configure CXX="g++-14" CPPFLAGS="-I$(brew --prefix)/include" LDFLAGS="-L$(brew --prefix)/lib"
-  #   - name: Build with g++-14
-  #     run: make -j4
+  build-on-x86:
+    runs-on: macos-15-intel
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        submodules: recursive
+    - name: Update Homebrew
+      run: brew update
+    - name: Install automake
+      run: brew install automake
+    - name: Install dependencies
+      run: brew install htslib
+    - name: Generate configure script
+      run: ./autogen.sh
+    - name: configure with g++-14
+      run: ./configure CXX="g++-14" CPPFLAGS="-I$(brew --prefix)/include" LDFLAGS="-L$(brew --prefix)/lib"
+    - name: Build with g++-14
+      run: make -j4
   build-on-arm64:
     runs-on: macos-15
     steps:
diff --git a/.github/workflows/abismal_release_macos.yml b/.github/workflows/abismal_release_macos.yml
index da5dc84..f40cf4d 100644
--- a/.github/workflows/abismal_release_macos.yml
+++ b/.github/workflows/abismal_release_macos.yml
@@ -7,7 +7,7 @@ jobs:
   build-macos-binaries:
     strategy:
       matrix:
-        os: [macos-13, macos-14]
+        os: [macos-15-intel, macos-14]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4