Some documents can’t be opened with apps which should be able to edit them. These tools address problems with their metadata.
quarantine
Utility to clear quarantine flags on folders of documents, now runs native on Apple Silicon.
Oxygen rebreather diving sets have been involved in many diving deaths. They and layered security can be analysed using James Reason’s Swiss cheese model of causation.
How apps can opt to set the quarantine flag on files they create, and how macOS can override that to protect you.
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.
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.
The Eclectic Light Company 