diff --git a/action.yml b/action.yml
index 7a824f0..1f2d22c 100644
--- a/action.yml
+++ b/action.yml
@@ -82,15 +82,20 @@ runs:
           echo "PQ_LIB_DIR=$PG_LIBDIR" >> $GITHUB_ENV
 
         elif [ "$RUNNER_OS" == "macOS" ]; then
+          export HOMEBREW_NO_ENV_HINTS=1
           export HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK=1
           export HOMEBREW_NO_INSTALL_CLEANUP=1
           export HOMEBREW_NO_INSTALL_UPGRADE=1
-          brew install --skip-post-install postgresql@${{ inputs.postgres-version }}
+          brew install --quiet --skip-post-install postgresql@${{ inputs.postgres-version }}
 
           # Link PostgreSQL binaries from /usr/local/bin in order to make them
-          # available globally. The overwrite option is required since some
-          # GitHub runners come with preinstalled PostgreSQL binaries.
-          brew link --overwrite postgresql@${{ inputs.postgres-version }}
+          # available globally. The --overwrite option is required since some
+          # GitHub runners come with preinstalled PostgreSQL binaries, and we
+          # have to link the required version of PostgreSQL. The unlinking step
+          # is needed to suppress "Already linked" warning which is propagated
+          # back to users.
+          brew unlink --quiet postgresql@${{ inputs.postgres-version }}
+          brew link --quiet --overwrite postgresql@${{ inputs.postgres-version }}
         fi
       shell: bash