Hey there, Thanks for the answer. Since I am new to mac, I don't really know how to run syspolicy_check against a dmg. But I can see that it adds com.apple.quarentine when downloaded online. Which is why it does not let me open the app.

I don't want the end user to remove the quarantine tag manually as it is bad user experience. What can I do that even when I upload the dmg on my website, it does not add that tag or if its adding, at least give the option to open anyway.