diff --git a/.github/workflows/rc.yml b/.github/workflows/rc.yml
index a2a85604e..fa27c99ce 100644
--- a/.github/workflows/rc.yml
+++ b/.github/workflows/rc.yml
@@ -105,13 +105,6 @@ jobs:
         shell: bash
         run: sudo apt-get update && sudo apt-get install -y libcurl4-openssl-dev
 
-      - name: Install fmt on macOS
-        if: ${{ startsWith(matrix.os, 'macos') }}
-        shell: bash
-        run: |
-          brew install fmt
-          echo "CMAKE_PREFIX_PATH=$(brew --prefix fmt):${CMAKE_PREFIX_PATH:-}" >> "${GITHUB_ENV}"
-
       - name: Verify
         run: |
           tar_gz=$(echo apache-iceberg-cpp-*.tar.gz)
diff --git a/.github/workflows/s3_test.yml b/.github/workflows/s3_test.yml
index 415477b2f..0cf8e8b1e 100644
--- a/.github/workflows/s3_test.yml
+++ b/.github/workflows/s3_test.yml
@@ -75,12 +75,6 @@ jobs:
         run: |
           echo "CC=${{ matrix.CC }}" >> $GITHUB_ENV
           echo "CXX=${{ matrix.CXX }}" >> $GITHUB_ENV
-      - name: Install fmt on macOS
-        if: ${{ startsWith(matrix.runs-on, 'macos') }}
-        shell: bash
-        run: |
-          brew install fmt
-          echo "CMAKE_PREFIX_PATH=$(brew --prefix fmt):${CMAKE_PREFIX_PATH:-}" >> "${GITHUB_ENV}"
       - name: Start MinIO
         shell: bash
         run: bash ci/scripts/start_minio.sh
diff --git a/.github/workflows/sql_catalog_test.yml b/.github/workflows/sql_catalog_test.yml
index be0837745..7d93e984d 100644
--- a/.github/workflows/sql_catalog_test.yml
+++ b/.github/workflows/sql_catalog_test.yml
@@ -80,12 +80,6 @@ jobs:
         run: |
           echo "CC=${{ matrix.CC }}" >> $GITHUB_ENV
           echo "CXX=${{ matrix.CXX }}" >> $GITHUB_ENV
-      - name: Install dependencies on macOS
-        if: ${{ startsWith(matrix.runs-on, 'macos') }}
-        shell: bash
-        run: |
-          brew install fmt
-          echo "CMAKE_PREFIX_PATH=$(brew --prefix fmt):${CMAKE_PREFIX_PATH:-}" >> "${GITHUB_ENV}"
       - name: Install dependencies on Windows
         if: ${{ startsWith(matrix.runs-on, 'windows') }}
         shell: pwsh
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ea0c94204..41bdd4b97 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -77,11 +77,6 @@ jobs:
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - name: Install fmt
-        shell: bash
-        run: |
-          brew install fmt
-          echo "CMAKE_PREFIX_PATH=$(brew --prefix fmt):${CMAKE_PREFIX_PATH:-}" >> "${GITHUB_ENV}"
       - name: Build Iceberg
         shell: bash
         run: ci/scripts/build_iceberg.sh $(pwd)
diff --git a/cmake_modules/IcebergThirdpartyToolchain.cmake b/cmake_modules/IcebergThirdpartyToolchain.cmake
index 3b4340cf5..9b5d95a7e 100644
--- a/cmake_modules/IcebergThirdpartyToolchain.cmake
+++ b/cmake_modules/IcebergThirdpartyToolchain.cmake
@@ -226,7 +226,7 @@ function(resolve_avro_dependency)
     fetchcontent_declare(avro-cpp
                          ${FC_DECLARE_COMMON_OPTIONS}
                          GIT_REPOSITORY ${AVRO_GIT_REPOSITORY}
-                         GIT_TAG 11fb55500bed9fbe9af53b85112cd13887f0ce80
+                         GIT_TAG 997d50d312613e921598aaed30b082f9bcf9c6ea
                          SOURCE_SUBDIR
                          lang/c++
                          FIND_PACKAGE_ARGS