Open SAP Shortcut file in Safari browser automatically

Hello, I am looking the way to set Safari browser settings on MAC system to open tx.sap file automatically using SAP GUI for Java. The MAC OS is Mojave, Safari browser 12 and Java GUI is 7.50 Rev4. When I access any Portal iView inside Safari browser it always stores the tx.sap file in download folder where user need to click on the file to open in SAP GUI for Java.

I already performed below setting however it doesn't work,

1. Open the Safari browser.
2. Click Safari menu > Preferences.
3. Under General tab, check Open “safe” files after downloading

Is there any other way to launch tx.sap file directly after download?

Best Regards,VB