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September 1st, 2009

It's so clever I want to claw my eyes out.

So OS X 10.6 introduces lots of stuff to do with compressed files but Apple want to prevent things going horribly wrong if you do things with those files on an older version of OS X, and they don't want to make the volume the file is on unreadable. So large compressed files are stored in the resource fork, and small compressed files are stored in an extended attribute. Move or copy the files using an older version of the OS and everything will work without a hitch even though you won't be able to view their contents.

Clever, but it still makes me shudder slightly.

Presumably they won't need to pull such tricks if they ever move over to zfs as that won't have to maintain compatibility with older version of OS X.

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