With recent privacy protection, notarization requirements, and extended checking of executable code, it’s getting more common for an app not to launch. What can you do when that happens?
XProtect
Important changes for anyone distributing command tools in particular, and a good time to ensure you only ship signed and notarized apps if possible.
Look in Activity Monitor or the log, and you won’t find anything named Gatekeeper, is its a team of different systems, each of which can work on its own. Here’s the detail and a diagram.
First full release version, which conforms to macOS clearance convention, and lets you know which flags it has changed.
How this occurs, why, and what to do to manage the problem when it affects you. Complete with a visual summary and references.
Try using this workaround: it requires quick actions, and despite Apple’s promise, it only works until you next save the document.
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.
The Eclectic Light Company 