diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7051fce6..15e66b3a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -73,7 +73,7 @@ jobs:
             packager: "apt"
             packages: "lcov"
 
-          - os: macos-latest
+          - os: macos-13
             cxx: "clang++"
             link: "dynamic"
             optimization: "size"
@@ -82,12 +82,12 @@ jobs:
             boost: "--build-boost"
             icu: "--build-icu --with-icu"
             cc: "clang"
-            flags: "-Os -fPIE"
+            flags: "-Os -fPIE -DBOOST_NO_CXX98_FUNCTION_BASE"
             options: "--enable-isystem"
             packager: "brew"
             packages: ""
 
-          - os: macos-latest
+          - os: macos-13
             cxx: "clang++"
             link: "static"
             optimization: "size"
@@ -96,7 +96,7 @@ jobs:
             boost: "--build-boost"
             icu: "--build-icu --with-icu"
             cc: "clang"
-            flags: "-Os -fvisibility=hidden -fPIE"
+            flags: "-Os -fvisibility=hidden -fPIE -DBOOST_NO_CXX98_FUNCTION_BASE"
             options: "--enable-isystem"
             packager: "brew"
             packages: ""
@@ -220,11 +220,12 @@ jobs:
 
 
       - name: Failure display otool output
-        if: ${{ failure() && (matrix.os == 'macos-latest') }}
+        if: ${{ failure() && startsWith(matrix.os, 'macos') }}
         run: |
           otool -L ${{ github.workspace }}/test/.libs/libbitcoin-node-test
+
       - name: Failure display DYLD_PRINT_LIBRARIES
-        if: ${{ failure() && (matrix.os == 'macos-latest') }}
+        if: ${{ failure() && startsWith(matrix.os, 'macos') }}
         run: |
           DYLD_PRINT_LIBRARIES=1 ${{ github.workspace }}/test/.libs/libbitcoin-node-test
 
@@ -297,7 +298,7 @@ jobs:
             packager: "apt"
             packages: ""
 
-          - os: macos-latest
+          - os: macos-13
             cxx: "clang++"
             link: "dynamic"
             optimization: "size"
@@ -306,12 +307,12 @@ jobs:
             boost: "--build-boost"
             icu: "--build-icu --with-icu"
             cc: "clang"
-            flags: "-Os -fPIE"
+            flags: "-Os -fPIE -DBOOST_NO_CXX98_FUNCTION_BASE"
             options: ""
             packager: "brew"
             packages: ""
 
-          - os: macos-latest
+          - os: macos-13
             cxx: "clang++"
             link: "static"
             optimization: "size"
@@ -320,7 +321,7 @@ jobs:
             boost: "--build-boost"
             icu: "--build-icu --with-icu"
             cc: "clang"
-            flags: "-Os -fvisibility=hidden -fPIE"
+            flags: "-Os -fvisibility=hidden -fPIE -DBOOST_NO_CXX98_FUNCTION_BASE"
             options: ""
             packager: "brew"
             packages: ""
@@ -447,11 +448,12 @@ jobs:
 
 
       - name: Failure display otool output
-        if: ${{ failure() && (matrix.os == 'macos-latest') }}
+        if: ${{ failure() && startsWith(matrix.os, 'macos') }}
         run: |
           otool -L ${{ github.workspace }}/test/.libs/libbitcoin-node-test
+
       - name: Failure display DYLD_PRINT_LIBRARIES
-        if: ${{ failure() && (matrix.os == 'macos-latest') }}
+        if: ${{ failure() && startsWith(matrix.os, 'macos') }}
         run: |
           DYLD_PRINT_LIBRARIES=1 ${{ github.workspace }}/test/.libs/libbitcoin-node-test
 
@@ -646,11 +648,12 @@ jobs:
 
 
       - name: Failure display otool output
-        if: ${{ failure() && (matrix.os == 'macos-latest') }}
+        if: ${{ failure() && startsWith(matrix.os, 'macos') }}
         run: |
           otool -L ${{ github.workspace }}/test/.libs/libbitcoin-node-test
+
       - name: Failure display DYLD_PRINT_LIBRARIES
-        if: ${{ failure() && (matrix.os == 'macos-latest') }}
+        if: ${{ failure() && startsWith(matrix.os, 'macos') }}
         run: |
           DYLD_PRINT_LIBRARIES=1 ${{ github.workspace }}/test/.libs/libbitcoin-node-test