diff --git a/.github/workflows/benchmarkadhoc.yml b/.github/workflows/benchmarkadhoc.yml
index 46253e9d4..b9642cf74 100644
--- a/.github/workflows/benchmarkadhoc.yml
+++ b/.github/workflows/benchmarkadhoc.yml
@@ -31,10 +31,10 @@ jobs:
       matrix:
         # macos-latest and ubuntu-latest uses OpenSSL 3 which breaks tests
         # os: [macos-11, ubuntu-20.04, windows-latest]
-        os: [ macos-13 ]
+        os: [ macos-13-arm-64 ]
         # Run lowest and highest Java versions only
         # java: [ 8, 21 ]
-        java: [ 8 ]
+        java: [ 11 ]
         experimental: [false]
       fail-fast: false
         
@@ -55,16 +55,16 @@ jobs:
         java-version: ${{ matrix.java }}
     - name: OpenSSL version
       run: openssl version -a
-    - name: Build with Maven
-      # OPENSSL_HOME is needed for Windows build; not used by other builds so can set unconditionally
-      # It's not clear how one is supposed to find the correct setting;
-      # The value below was found by searching for openssl files under C (warning: slow)
-      # Other possible values are:
-      # "C:\\Miniconda\\pkgs\\openssl-1.1.1n-h2bbff1b_0\\Library"
-      # "C:\\ProgramData\\chocolatey\\lib\\mingw\\tools\\install\\mingw64\\opt"
-      env:
-        OPENSSL_HOME: "C:\\Miniconda\\Library"
-      run: mvn --show-version --batch-mode --no-transfer-progress -DtrimStackTrace=false clean test-compile -Pbenchmark
-      # will fail on Windows...
+    # - name: Build with Maven
+    #   # OPENSSL_HOME is needed for Windows build; not used by other builds so can set unconditionally
+    #   # It's not clear how one is supposed to find the correct setting;
+    #   # The value below was found by searching for openssl files under C (warning: slow)
+    #   # Other possible values are:
+    #   # "C:\\Miniconda\\pkgs\\openssl-1.1.1n-h2bbff1b_0\\Library"
+    #   # "C:\\ProgramData\\chocolatey\\lib\\mingw\\tools\\install\\mingw64\\opt"
+    #   env:
+    #     OPENSSL_HOME: "C:\\Miniconda\\Library"
+    #   run: mvn --show-version --batch-mode --no-transfer-progress -DtrimStackTrace=false clean test-compile -Pbenchmark
+    #   # will fail on Windows...
     - name: Host details
       run: uname -a