diff --git a/.github/workflows/enzyme-ci.yml b/.github/workflows/enzyme-ci.yml
index 5f8e9ea6e524..e112f678707c 100644
--- a/.github/workflows/enzyme-ci.yml
+++ b/.github/workflows/enzyme-ci.yml
@@ -56,13 +56,14 @@ jobs:
   
   build-macos:
     name: Enzyme CI LLVM ${{ matrix.llvm }} ${{ matrix.build }} macOS
-    runs-on: macos-latest
+    runs-on: ${{ matrix.os }}
     
     strategy:
       fail-fast: false
       matrix:
         llvm: ["12", "13", "14", "15", "16"]
         build: ["Release", "Debug"] # "RelWithDebInfo"
+        os: [macos-13, macos-14]
   
     timeout-minutes: 30 
     steps:
@@ -79,29 +80,30 @@ jobs:
       run: cmake ../enzyme -DCMAKE_BUILD_TYPE=${{ matrix.build }} -DLLVM_EXTERNAL_LIT=`which lit` -DLLVM_DIR=`brew --prefix llvm@${{ matrix.llvm }}`/lib/cmake/llvm
     - name: make
       working-directory: build
-      run: make -j 3
+      run: make -j `sysctl -n hw.ncpu`
     - name: make check-typeanalysis
       working-directory: build
-      run: make -j 3 check-typeanalysis
+      run: make -j `sysctl -n hw.ncpu` check-typeanalysis
     - name: make check-activityanalysis
       working-directory: build
-      run: make -j 3 check-activityanalysis
+      run: make -j `sysctl -n hw.ncpu` check-activityanalysis
     - name: make check-enzyme
       working-directory: build
-      run: make -j3 check-enzyme-bench
+      run: make -j `sysctl -n hw.ncpu` check-enzyme-bench
     - name: graph results
       if: github.event_name != 'pull_request' && matrix.build == 'Release'
       run: python3 enzyme/test/upload-results.py build/test/Enzyme/results.json --url https://enzyme.mit.edu/cibench/api --token ${{ secrets.GRAPH_TOKEN }}
 
   build-xcode:
     name: Enzyme CI LLVM ${{ matrix.llvm }} ${{ matrix.build }} macOS XCode
-    runs-on: macos-latest
+    runs-on: ${{ matrix.os }}
 
     strategy:
       fail-fast: false
       matrix:
         llvm: ["13"] #, "14"]
         build: ["Release"] # "RelWithDebInfo"
+        os: [macos-13, macos-14]
 
     timeout-minutes: 30
     steps:
@@ -116,4 +118,4 @@ jobs:
       working-directory: build
       run: |
           cmake ../enzyme -GXcode -DCMAKE_BUILD_TYPE=${{ matrix.build }} -DLLVM_EXTERNAL_LIT=`which lit` -DLLVM_DIR=`brew --prefix llvm@${{ matrix.llvm }}`/lib/cmake/llvm
-          cmake --build . --parallel 3
+          cmake --build . --parallel `sysctl -n hw.ncpu`
diff --git a/.github/workflows/enzyme-julia.yml b/.github/workflows/enzyme-julia.yml
index 4aabf7204f5b..ce2daaaec1af 100644
--- a/.github/workflows/enzyme-julia.yml
+++ b/.github/workflows/enzyme-julia.yml
@@ -23,9 +23,9 @@ jobs:
           - '1.8'
         os:
           - ubuntu-latest
-          - macOS-latest
-        arch:
-          - x64
+          - macos-13
+          - macos-14
+          
     timeout-minutes: 60 
     steps:
     - uses: actions/checkout@v4
@@ -37,15 +37,14 @@ jobs:
     - uses: julia-actions/setup-julia@v1
       with:
         version: ${{ matrix.version }}
-        arch: ${{ matrix.arch }}
 
     - name: Build libEnzyme
-      if: ${{ matrix.os != 'macOS-latest'}}
+      if: ${{ matrix.os == 'ubuntu-latest'}}
       run: |
         julia --project=jl/deps -e 'using Pkg; Pkg.instantiate()'
         julia --project=jl/deps jl/deps/build_local.jl ./enzyme
     - name: Build libEnzyme MacOS
-      if: ${{ matrix.os == 'macOS-latest'}}
+      if: ${{ matrix.os == 'macos-13'}}
       run: |
         julia --project=jl/deps -e 'using Pkg; Pkg.instantiate()'
         SDKROOT=`xcrun --show-sdk-path` julia --project=jl/deps jl/deps/build_local.jl ./enzyme