diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ea712e5b2..6ae591aa2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -124,8 +124,8 @@ jobs:
   #   This job doesn't work with GitHub Actions using macOS 11+ because "load_osxfuse" returns
   #   "exit code = 1".(requires OS reboot)
   #
-  macos-13:
-    runs-on: macos-13
+  macos-14:
+    runs-on: macos-14
 
     steps:
       - name: Checkout source code
@@ -140,7 +140,10 @@ jobs:
 
       - name: Install fuse-t
         run: |
-          HOMEBREW_NO_AUTO_UPDATE=1 brew install fuse-t
+          # [NOTE]
+          # Install macfuse to install fuse.h and fuse related headers.
+          #
+          HOMEBREW_NO_AUTO_UPDATE=1 brew install macfuse fuse-t
 
       - name: Install brew other packages
         run: |
@@ -158,7 +161,7 @@ jobs:
       - name: Build
         run: |
           ./autogen.sh
-          PKG_CONFIG_PATH=/usr/local/opt/curl/lib/pkgconfig:/usr/local/opt/openssl/lib/pkgconfig ./configure CXXFLAGS='-std=c++11 -DS3FS_PTHREAD_ERRORCHECK=1'
+          PKG_CONFIG_PATH=/usr/local/opt/curl/lib/pkgconfig:/usr/local/opt/openssl/lib/pkgconfig ./configure CXXFLAGS='-std=c++11 -DS3FS_PTHREAD_ERRORCHECK=1 -I/usr/loval/include/fuse'
           make --jobs=$(sysctl -n hw.ncpu)
 
       - name: Cppcheck
diff --git a/test/integration-test-common.sh b/test/integration-test-common.sh
index 2a561fe52..2d4ce89fa 100644
--- a/test/integration-test-common.sh
+++ b/test/integration-test-common.sh
@@ -174,7 +174,8 @@ function start_s3proxy {
             S3PROXY_CACERT_FILE=""
         fi
 
-        "${STDBUF_BIN}" -oL -eL java -jar "${S3PROXY_BINARY}" --properties "${S3PROXY_CONFIG}" &
+        #"${STDBUF_BIN}" -oL -eL java -jar "${S3PROXY_BINARY}" --properties "${S3PROXY_CONFIG}" &
+        java -jar "${S3PROXY_BINARY}" --properties "${S3PROXY_CONFIG}" &
         S3PROXY_PID=$!
 
         # wait for S3Proxy to start
@@ -188,7 +189,8 @@ function start_s3proxy {
             chmod +x "${CHAOS_HTTP_PROXY_BINARY}"
         fi
 
-        "${STDBUF_BIN}" -oL -eL java -jar "${CHAOS_HTTP_PROXY_BINARY}" --properties chaos-http-proxy.conf &
+        #"${STDBUF_BIN}" -oL -eL java -jar "${CHAOS_HTTP_PROXY_BINARY}" --properties chaos-http-proxy.conf &
+        java -jar "${CHAOS_HTTP_PROXY_BINARY}" --properties chaos-http-proxy.conf &
         CHAOS_HTTP_PROXY_PID=$!
 
         # wait for Chaos HTTP Proxy to start
@@ -294,9 +296,9 @@ function start_s3fs {
     # subshell with set -x to log exact invocation of s3fs-fuse
     # shellcheck disable=SC2086
     (
+        # ${STDBUF_BIN} -oL -eL \ #
         set -x 
         CURL_CA_BUNDLE="${S3PROXY_CACERT_FILE}" \
-        ${STDBUF_BIN} -oL -eL \
             ${VALGRIND_EXEC} \
             ${S3FS} \
             ${TEST_BUCKET_1} \
@@ -319,7 +321,8 @@ function start_s3fs {
             -f \
             "${@}" &
         echo $! >&3
-    ) 3>pid | "${STDBUF_BIN}" -oL -eL "${SED_BIN}" "${SED_BUFFER_FLAG}" "s/^/s3fs: /" &
+    ) 3>pid | "${SED_BIN}" "${SED_BUFFER_FLAG}" "s/^/s3fs: /" &
+    #) 3>pid | "${STDBUF_BIN}" -oL -eL "${SED_BIN}" "${SED_BUFFER_FLAG}" "s/^/s3fs: /" &
     sleep 1
     S3FS_PID=$(<pid)
     export S3FS_PID