Good day everyone! I've got a question regarding Gatekeeper. If an app was developed by an unknown developer—one with no Developer ID—or tampered with, Gatekeeper can block the app from being installed. https://support.apple.com/et-ee/HT202491 I get this is when you download the app from Internet. But let's say I transer files from CD, DVD or external hard drive - will Gatekeeper notify me if there is something that wants to activate and run? Scenario 1) There is app on external hard drive, CD: if it lacks Apple ID, will Gatekeeper ask if I want to run it? Scenario 2) There is hidden malicious program on external hard drive, CD: will Gatekeeper ask if I want to run it? Or will Gatekeeper only keep eye on things downloaded from Internet?