diff --git a/.cspell/words.txt b/.cspell/words.txt
index c319d4b..3d435e0 100644
--- a/.cspell/words.txt
+++ b/.cspell/words.txt
@@ -481,4 +481,4 @@ xlog
 xmap
 xvzf
 yapf
-yaps
\ No newline at end of file
+yaps
diff --git a/common.sh b/common.sh
index aa9a4fe..0fba2e6 100755
--- a/common.sh
+++ b/common.sh
@@ -94,6 +94,15 @@ if ! command -v luafmt >/dev/null 2>&1; then
 fi
 check_binary luafmt
 
+if [ "${NVIM_OS}" = "macOS" ] &&
+  ! command -v vala-language-server >/dev/null 2>&1; then
+  check_binary brew
+  brew install vala-language-server
+fi
+if [ "${NVIM_OS}" = "macOS" ]; then
+  check_binary vala-language-server
+fi
+
 pushd "${SCRIPT_DIR}" 1>/dev/null 2>&1 || error_exit "failed to push: ${SCRIPT_DIR}"
 FNAME=cpptools-${NVIM_OS}-${NVIM_ARCH2}.vsix
 if [ ! -f "dap/${FNAME}" ]; then