An explanation of the magic which takes place when you double-click a document, the things that can go wrong, and how to fix them.
quarantine
Major improvements for all users, including more flexible main window, multiple selection, and support for macOS xattr flags for preservation.
The behaviour of quarantine flags, SIP flags, and the mysterious new com.apple.macl attribute, which never ceases to puzzle.
How does Catalina’s new privacy protection extend to folders such as ~/Documents? New information fills in detail.
How to check whether a macOS Installer app still has a valid signature, and where to find its hidden Installer packages.
Checking signatures, notarization, and 64-bit code on different items like apps, command tools, and Installer packages just got much simpler.
Its very convenient and quick to transfer files between Macs, but also sets the quarantine flag on everything it transfers. This can cause problems.
Yesterday, I explained how you can ensure that macOS 10.15 Catalina will open an app which doesn’t meet […]
Keep control over documents with quarantine flags to avoid bizarre security errors, using new versions of Pratique and Sandstrip.
How deeply does macOS check a signature? What are all the static code validation flags? Should my app leave macOS to perform signature checks?
The Eclectic Light Company 