diff --git a/scripts/clean.js b/scripts/clean.js
index 555fa84a7..e89ccfa5b 100644
--- a/scripts/clean.js
+++ b/scripts/clean.js
@@ -15,6 +15,18 @@ exports.cleanIrisDir = async () => {
   logger.info(`clean:${destIrisSDKDir}`);
 };
 
+exports.cleanIrisUselessFile = async () => {
+  let uselessFileList = [
+    `${destIrisSDKDir}/MAC/Release/AgoraRtcWrapperUnity.bundle`,
+  ];
+  for (let file of uselessFileList) {
+    if (fs.existsSync(file)) {
+      await fs.remove(file);
+      logger.info(`clean:${file}`);
+    }
+  }
+};
+
 exports.cleanBuildDir = async () => {
   await fs.remove(buildDir);
   logger.info(`clean:${buildDir}`);
diff --git a/scripts/synclib.js b/scripts/synclib.js
index 7f8d34fe6..50109b8b9 100644
--- a/scripts/synclib.js
+++ b/scripts/synclib.js
@@ -2,7 +2,11 @@ const path = require('path');
 
 const download = require('download');
 
-const { destIrisSDKDir, cleanIrisDir } = require('./clean');
+const {
+  destIrisSDKDir,
+  cleanIrisDir,
+  cleanIrisUselessFile,
+} = require('./clean');
 const getConfig = require('./getConfig');
 const logger = require('./logger');
 const { getOS } = require('./util');
@@ -33,7 +37,9 @@ const syncLib = async (cb) => {
   const os = getOS();
   await downloadSDK({
     preHook: cleanIrisDir,
-    postHook: () => {},
+    postHook: () => {
+      os === 'mac' && cleanIrisUselessFile();
+    },
     sdkURL: os === 'mac' ? iris_sdk_mac : iris_sdk_win,
     destDir: destIrisSDKDir,
   });