AirDrop is very convenient, but sets the quarantine flag, which can break Apple’s installer apps. Here’s how to remove those flags in a couple of minutes.
quarantine
How Catalina and Big Sur handle the first run of apps which have their quarantine flag set. With details of log entries seen in both steps needed for approval.
All about xattrs: their origin, where they’re stored, how they’re named and typed, how to find and work with them, and their common problems.
Utility to strip spurious quarantine flags from documents in folders, now runs native on Apple Silicon.
Some documents can’t be opened with apps which should be able to edit them. These tools address problems with their metadata.
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 Eclectic Light Company 