Developers: Apple reiterates the need to "notarize" apps for macOS Catalina
In June of this year, Apple announced that Mac software distributed outside of the Mac App Store must be "notarized" (authenticated) by Apple in order to run by default with macOS Catalina.
In September, Apple temporarily changed the notarization prerequisites to make the transition easier and protect macOS Catalina users who continue to use old versions of the software.
Apple reports to developers that as of February 3, 2020, all submitted software must meet the original prerequisites for notarization. Developers who have not yet done so must upload software to the notarization service and review the developer logs with warnings. These warnings will become errors starting February 3 and must be fixed in order to have the software authenticated. Software notarized before February 3 will continue to run on macOS Catalina by default.
Apple still remembers as a reminder that all packages with installers must be signed because they may contain executable code. Disc images do not need to be signed, although signing may help users verify the content.
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