How to trigger GateKeeper quarantine without uploading/ downloading the file/ installer?

Question

I made a pkg installer and I'm trying to debug the codesigning issue where GateKeeper has put the quarantine flag on the installer.

This quarantine translates to the permission denied when the application through the CLI, or when double clicking, or when right clicking > open:

It does this only when the installer gets downloaded. I think I have figured out why the installer gets quarantined by GateKeeper, but the only way I can test this is by uploading it and then downloading it. This is slow, and I would like to run GateKeeper checks without wasting time uploading to the internet.

I read somewhere that zip`ing the file and unzipping it might work, it doesn't.

Answer 1

The quickest solution I came up with is to drag and drop the file onto a web browser and re-download it from the browser. This doesn't use any internet. It still passes through GateKeeper since the quarantine flag is re-added to the .pkg file.

Even Apple doesn't suggest this:

Quarantine a copy of your app. You can do this in either of the following ways:

• Email the app to yourself and use the copy that Mail downloads.

• Host the app on your own local or remote server and use the copy that Safari downloads