diff --git a/.github/workflows/ax.yml b/.github/workflows/ax.yml
index 0b8c99463f..b853ae60ee 100644
--- a/.github/workflows/ax.yml
+++ b/.github/workflows/ax.yml
@@ -123,9 +123,9 @@ jobs:
       matrix:
         config:
           #@note llvm10 never got its own brew formula...
-          - { runner: 'macos-latest', cxx: 'clang++', build: 'Release', llvm: '11' }
-          - { runner: 'macos-latest', cxx: 'clang++', build: 'Release', llvm: '12' }
-          - { runner: 'macos-latest', cxx: 'clang++', build: 'Release', llvm: '13' }
+          # Last macos runner befor M1 (macos-14)
+          - { runner: 'macos-13', cxx: 'clang++', build: 'Release', llvm: '12' }
+          - { runner: 'macos-13', cxx: 'clang++', build: 'Release', llvm: '13' }
       fail-fast: false
     steps:
       - uses: actions/checkout@v3
@@ -139,7 +139,8 @@ jobs:
           --cargs=\"
           -DOPENVDB_AX_TEST_CMD_DOWNLOADS=ON
           -DUSE_EXPLICIT_INSTANTIATION=OFF
-          -DLLVM_DIR=/usr/local/opt/llvm@${{ matrix.config.llvm }}/lib/cmake/llvm
+          -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/install
+          -DLLVM_DIR=/opt/homebrew/opt/llvm@${{ matrix.config.llvm }}/lib/cmake/llvm
           \"
       - name: test
         run: cd build && ctest -V
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c9b36595c9..5514f2d856 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -186,7 +186,7 @@ jobs:
       github.event_name != 'workflow_dispatch' ||
       github.event.inputs.type == 'all' ||
       github.event.inputs.type == 'mac'
-    runs-on: macos-latest
+    runs-on: macos-13 # Last macos runner befor M1 (macos-14)
     env:
       CXX: clang++
     steps:
@@ -198,5 +198,8 @@ jobs:
         ./ci/build.sh -v
         --build-type=Release
         --components=\"core,python,bin,view,render,test\"
+        --cargs=\'
+        -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/install
+        \'
     - name: test
       run: cd build && ctest -V
diff --git a/.github/workflows/houdini.yml b/.github/workflows/houdini.yml
index 8252cf5473..21c16a2048 100644
--- a/.github/workflows/houdini.yml
+++ b/.github/workflows/houdini.yml
@@ -159,16 +159,7 @@ jobs:
         cp hou/hou.tar.gz $HOME/houdini_install/hou.tar.gz
         cd $HOME/houdini_install && tar -xzf hou.tar.gz && cd -
     - name: install_deps
-      run: |
-        # Remove Python3 symlinks in /usr/local/bin as workaround to brew update issues
-        # https://github.com/actions/setup-python/issues/577
-        rm /usr/local/bin/2to3* || :
-        rm /usr/local/bin/idle3* || :
-        rm /usr/local/bin/pydoc* || :
-        rm /usr/local/bin/python3* || :
-        brew update
-        brew install bash gnu-getopt cmake boost glfw googletest openexr pybind11 llvm@15 cppunit
-        echo "/usr/local/opt/gnu-getopt/bin" >> $GITHUB_PATH
+      run: ./ci/install_macos.sh ${{ matrix.config.llvm }}
     - name: build
       run: |
         ./ci/build.sh -v \
@@ -182,6 +173,7 @@ jobs:
             -DDISABLE_DEPENDENCY_VERSION_CHECKS=ON \
             -DUSE_EXPLICIT_INSTANTIATION=OFF \
             -DLLVM_DIR=/usr/local/opt/llvm@15/lib/cmake/llvm \
+            -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/install
             \"
     - name: test
       run: cd build && ctest -V
diff --git a/.github/workflows/nanovdb.yml b/.github/workflows/nanovdb.yml
index 35c25010e4..2510a90e39 100644
--- a/.github/workflows/nanovdb.yml
+++ b/.github/workflows/nanovdb.yml
@@ -122,9 +122,7 @@ jobs:
       run: .\ci\install_windows_cuda.ps1
     - name: install_deps
       shell: bash
-      run: |
-        vcpkg update
-        vcpkg install zlib tbb gtest blosc boost-iostreams boost-system boost-any boost-uuid boost-interprocess boost-algorithm
+      run: ./ci/install_windows.sh
     - name: build
       shell: bash
       run: >
diff --git a/.github/workflows/weekly.yml b/.github/workflows/weekly.yml
index 7e26ca9305..71e36f7bf3 100644
--- a/.github/workflows/weekly.yml
+++ b/.github/workflows/weekly.yml
@@ -111,6 +111,8 @@ jobs:
       (github.event_name != 'workflow_dispatch' ||
        github.event.inputs.type == 'all' ||
        github.event.inputs.type == 'houdini')
+    # Note that macos-14 (current macos-latest) switches to M1. We could instead test
+    # the arm build here instead of the x86 one.
     runs-on: macos-latest
     name: macos-houdini-20
     env:
@@ -198,7 +200,7 @@ jobs:
           # Disable the clang job for now. See https://github.com/actions/runner-images/issues/8659
           # - { runson: ubuntu-latest, cxx: clang++, cmake: '' }
           # @todo gcc on macos
-          - { runson: macos-latest,  cxx: '',      cmake: '-D CMAKE_CXX_COMPILER=/usr/local/opt/llvm@15/bin/clang++' }
+          - { runson: macos-latest,  cxx: '',      cmake: '-D CMAKE_CXX_COMPILER=/opt/homebrew/opt/llvm@15/bin/clang++' }
       fail-fast: false
     steps:
       - uses: actions/checkout@v3
@@ -291,7 +293,7 @@ jobs:
       github.event_name != 'workflow_dispatch' ||
       github.event.inputs.type == 'all' ||
       github.event.inputs.type == 'ax'
-    runs-on: macos-latest
+    runs-on: macos-13
     name: macos-cxx:${{ matrix.config.cxx }}-llvm:${{ matrix.config.llvm }}-${{ matrix.config.build }}
     env:
       CXX: ${{ matrix.config.cxx }}
@@ -314,7 +316,8 @@ jobs:
           --cargs=\"
           -DOPENVDB_AX_TEST_CMD_DOWNLOADS=ON
           -DUSE_EXPLICIT_INSTANTIATION=OFF
-          -DLLVM_DIR=/usr/local/opt/llvm@${{ matrix.config.llvm }}/lib/cmake/llvm
+          -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/install
+          -DLLVM_DIR=/opt/homebrew/opt/llvm@${{ matrix.config.llvm }}/lib/cmake/llvm
           \"
       - name: test
         run: cd build && ctest -V
diff --git a/ci/install_macos.sh b/ci/install_macos.sh
index 39d89ba191..7707dbb1e9 100755
--- a/ci/install_macos.sh
+++ b/ci/install_macos.sh
@@ -33,6 +33,7 @@ echo "/usr/local/opt/$py_version/bin" >> $GITHUB_PATH
 
 # use gnu-getopt
 echo "/usr/local/opt/gnu-getopt/bin" >> $GITHUB_PATH
+echo "/opt/homebrew/opt/gnu-getopt/bin" >> $GITHUB_PATH
 
 LLVM_VERSION=$1
 if [ ! -z "$LLVM_VERSION" ]; then
diff --git a/ci/install_windows.sh b/ci/install_windows.sh
index 939668c4b3..9620ee42a7 100755
--- a/ci/install_windows.sh
+++ b/ci/install_windows.sh
@@ -1,8 +1,44 @@
 #!/usr/bin/env bash
 
-set -ex
+set -x
+set -e
 
+# Required dependencies
+VCPKG_INSTALL_CMD="vcpkg install
+    zlib
+    libpng
+    openexr
+    tbb
+    gtest
+    cppunit
+    blosc
+    glfw3
+    glew
+    python3
+    jemalloc
+    boost-iostreams
+    boost-interprocess
+    boost-algorithm
+    pybind11
+    --clean-after-build"
+
+# Update vcpkg
 vcpkg update
-vcpkg install zlib libpng openexr tbb gtest cppunit blosc glfw3 glew python3 jemalloc \
-    boost-iostreams boost-interprocess boost-algorithm pybind11 \
-    --clean-after-build
+
+# Allow the vcpkg command to fail once so we can retry with the latest
+set +e
+$VCPKG_INSTALL_CMD
+STATUS=$?
+
+# Subsequent commands cannot fail
+set -x
+
+if [ $STATUS -ne 0 ]; then
+  # Try once more with latest ports
+  echo "vcpkg install failed, retrying with latest ports..."
+  cd $VCPKG_INSTALLATION_ROOT && git pull && cd-
+  vcpkg update
+  $VCPKG_INSTALL_CMD
+fi
+
+echo "vcpkg install completed successfully"