Are you looking for a programatic or scripting solution? Programatically, look at Launch Services (LSCopyAllRoleHandlersForContentType()
for instance). For scripting, you probably want lsregister
which is buried down in
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Support
Don't let its location in the docs fool you. It in the Carbon docs, but it's actually CoreServices, which is not deprecated.
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