diff --git a/Flutter/installation-and-upgrade/Flutter-Mac-Installer.md b/Flutter/installation-and-upgrade/Flutter-Mac-Installer.md
index c0635e8f4..f852a2fff 100644
--- a/Flutter/installation-and-upgrade/Flutter-Mac-Installer.md
+++ b/Flutter/installation-and-upgrade/Flutter-Mac-Installer.md
@@ -12,39 +12,50 @@ documentation: ug
 
 The steps below show how to install the Flutter Mac installer. 
 
-1. Open the Syncfusion Flutter Mac Installer(.pkg) file from downloaded location by double-clicking it. The Syncfusion Essential Studio Flutter Mac Installer's welcome wizard will be displayed. Click the Continue button.
+1. How to resolve the warning message in Catalina OS? 
+
+   While running Syncfusion Mac Installers on Catalina MacOS or later, the below alert will be displayed.
+
+   ![Alert Image](Mac-Installer_images/Mac_Catalina_MacOS_Alert.png)  
+
+      If you face this alert, follow the below steps for easiest solution. 
+         
+         1.	Right click downloaded pkg file
+         2.	Select “Open With” option and choose Installer (Default)
+
+2. Open the Syncfusion Flutter Mac Installer(.pkg) file from downloaded location by double-clicking it. The Syncfusion Essential Studio Flutter Mac Installer's welcome wizard will be displayed. Click the Continue button.
 
    ![Welcome wizard](Mac-Installer_images/Mac_Installer1.png)
    
 
-2. The Software License Agreement wizard will appear. Click the Continue button.
+3. The Software License Agreement wizard will appear. Click the Continue button.
 
    ![license wizard](Mac-Installer_images/Mac_Installer2.png)   
    
 
-3. The License Agreement's Confirmation window will appear. If you have read the Software License Agreement, click **Agree**.
+4. The License Agreement's Confirmation window will appear. If you have read the Software License Agreement, click **Agree**.
 
    ![License confirmation wizard](Mac-Installer_images/Mac_Installer3.png)
    
    N> The Unlock key is not required to install the Mac installer. The Syncfusion Mac installer can be used for development purposes without registering the Unlock key..
 
-4. The Destination select wizard will appear. You can choose which disc to install the Syncfusion Essential Studio for Flutter installer on here.
+5. The Destination select wizard will appear. You can choose which disc to install the Syncfusion Essential Studio for Flutter installer on here.
 
    ![license wizard](Mac-Installer_images/Mac_Installer11.png)
 
-5. The Installation Type wizard will appear. Click Install to begin the standard installation of the Syncfusion Flutter Mac installer.
+6. The Installation Type wizard will appear. Click Install to begin the standard installation of the Syncfusion Flutter Mac installer.
 
    ![Installation type wizard](Mac-Installer_images/Mac_Installer6.png)
 
-6. The Authentication window will appear. To begin the installation, enter the Mac machine's password and click **Install Software**.
+7. The Authentication window will appear. To begin the installation, enter the Mac machine's password and click **Install Software**.
 
    ![Credential wizard](Mac-Installer_images/Mac_Installer7.png)
 
-7. The installation process will begin on your machine. 
+8. The installation process will begin on your machine. 
    
    ![Progress wizard](Mac-Installer_images/Mac_Installer8.png)
    
-8. Once the installation is complete, the completed screen will be displayed. To exit the installation wizard, click Close. 
+9. Once the installation is complete, the completed screen will be displayed. To exit the installation wizard, click Close. 
 
    ![Finish wizard](Mac-Installer_images/Mac_Installer9.png)
     
diff --git a/Flutter/installation-and-upgrade/Mac-Installer_images/Mac_Catalina_MacOS_Alert.png b/Flutter/installation-and-upgrade/Mac-Installer_images/Mac_Catalina_MacOS_Alert.png
new file mode 100644
index 000000000..54c0ea301
Binary files /dev/null and b/Flutter/installation-and-upgrade/Mac-Installer_images/Mac_Catalina_MacOS_Alert.png differ