This tool now has an overhauled interface, making it much easier to use. Currently the only way of viewing and editing xattrs without using the command line.
quarantine
A free tool to force full Gatekeeper checks without having to download an app, inspect, add, and remove xattrs from files and folders.
A simple and concise example of a page from the documentation which we, as a community, could readily produce for macOS. Fancy giving us a hand?
This tool for Sierra now inspects and displays extended attributes, and will write a quarantine xattr to force a full Gatekeeper check on an app, as if downloaded.
If you want someone else to be able to run your script app, you’ll need to sign it and get it past Gatekeeper’s checks. Here are more details about the role of xattrs in those, and how to run a full check without downloading your app.
They’re responsible for determining Gatekeeper’s checks, contain Finder information, and much more. With a new free tool too.
Perhaps not as effective as one of the better anti-virus apps, it is free and built into OS X.
The Eclectic Light Company 