The differences between a full Gatekeeper check, an AMFI check for integrity, and a normal app open, and why signature errors can be tolerated.
Signet
Whenever an app is opened in 10.14.2, its signature is checked asynchronously, often several times. But in many cases, macOS doesn’t act on any errors returned.
Another worthless piece of “security theatre” about bundle signatures. I wouldn’t bother reading it, or downloading the new version of Signet.
Is checking bundle signatures a waste of time once they have passed their ‘first run’ check? Does macOS ever do that?
Has your Mac got any old apps and other bundles on it? Have their signing certificates been revoked, or are they perhaps unsigned? Here’s a new app to help you find out.
The Eclectic Light Company 