Try using this workaround: it requires quick actions, and despite Apple’s promise, it only works until you next save the document.
quarantine
This utility changes quarantine flags on documents as if XProtect had checked and cleared them, so they work normally again. First beta.
Full release of Sandstrip, a utility to remove the quarantine flags attached to documents by sandboxed apps.
How a security feature trying to block malicious documents has rendered a Finder feature useless, causing users and developers problems.
Two sets of log excerpts demonstrate how macOS can prevent a user from opening a document, then mislead them into thinking it’s the app at fault.
You double-click to open a document, and see a security alert telling you it’s from an unidentified developer and your security settings prohibit opening. What the hell?
Second of two, here looking at quarantine of documents, what it means, how it occurs. Much more common than apps, but mysterious.
First of two articles – this looking at how quarantine works for apps and other executables, details of the flag itself, how it behaves, and more.
A simple utility to remove the many quarantine flags which are written when sandboxed apps open movies, PDF, JPEG and other files, and can cause problems.
Do we really need tens of thousands of spurious quarantine flags attached to perfectly good documents?
The Eclectic Light Company 