diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 14527fa1..0c34da08 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, macos-12, windows-2019]
+        os: [ubuntu-20.04, macos-13, windows-2019]
         install_mdns: [false, true]
         use_conan: [true]
         force_cpprest_asio: [false]
@@ -25,18 +25,18 @@ jobs:
         enable_authorization: [false, true]
         exclude:
           # install_mdns is only meaningful on Linux
-          - os: macos-12
+          - os: macos-13
             enable_authorization: false
           - os: windows-2019
             enable_authorization: false
           - os: ubuntu-20.04
             enable_authorization: false
-          - os: macos-12
+          - os: macos-13
             install_mdns: true
           - os: windows-2019
             install_mdns: true
           # for now, unicast DNS-SD tests are only implemented on Linux
-          - os: macos-12
+          - os: macos-13
             dns_sd_mode: unicast
           - os: windows-2019
             dns_sd_mode: unicast
@@ -618,8 +618,8 @@ jobs:
 
     - name: make badges
       run: |
-        # combine badges from all builds, exclude macos-12
-        ${{ github.workspace }}/Sandbox/make_badges.sh ${{ github.workspace }} ${{ runner.workspace }}/artifacts macos-12_auth macos-12_noauth
+        # combine badges from all builds, exclude macos-13
+        ${{ github.workspace }}/Sandbox/make_badges.sh ${{ github.workspace }} ${{ runner.workspace }}/artifacts macos-13_auth macos-13_noauth
 
         # force push to github onto an orphan 'badges' branch
         cd ${{ github.workspace }}
diff --git a/.github/workflows/src/build-test.yml b/.github/workflows/src/build-test.yml
index 4d51c148..47235b3c 100644
--- a/.github/workflows/src/build-test.yml
+++ b/.github/workflows/src/build-test.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, macos-12, windows-2019]
+        os: [ubuntu-20.04, macos-13, windows-2019]
         install_mdns: [false, true]
         use_conan: [true]
         force_cpprest_asio: [false]
@@ -25,18 +25,18 @@ jobs:
         enable_authorization: [false, true]
         exclude:
           # install_mdns is only meaningful on Linux
-          - os: macos-12
+          - os: macos-13
             enable_authorization: false
           - os: windows-2019
             enable_authorization: false
           - os: ubuntu-20.04
             enable_authorization: false
-          - os: macos-12
+          - os: macos-13
             install_mdns: true
           - os: windows-2019
             install_mdns: true
           # for now, unicast DNS-SD tests are only implemented on Linux
-          - os: macos-12
+          - os: macos-13
             dns_sd_mode: unicast
           - os: windows-2019
             dns_sd_mode: unicast
@@ -132,8 +132,8 @@ jobs:
 
     - name: make badges
       run: |
-        # combine badges from all builds, exclude macos-12
-        ${{ github.workspace }}/Sandbox/make_badges.sh ${{ github.workspace }} ${{ runner.workspace }}/artifacts macos-12_auth macos-12_noauth
+        # combine badges from all builds, exclude macos-13
+        ${{ github.workspace }}/Sandbox/make_badges.sh ${{ github.workspace }} ${{ runner.workspace }}/artifacts macos-13_auth macos-13_noauth
 
         # force push to github onto an orphan 'badges' branch
         cd ${{ github.workspace }}