Michael Tsai on Twitter: "@olebegemann @nicklockwood It predates xattrs so maybe in catalog info."

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Nick Lockwood ‏@nicklockwood Sep 10

The only thing worse than the concept of automatically hiding filename extensions on macOS is the implementation.
3 retweets 17 likes
Nick Lockwood ‏@nicklockwood Sep 10

I renamed an image to "foo.png", and when I pressed OK it's name appeared as "foo.png.png". So I removed one ".png" and now it's just "foo".
8 likes
Nick Lockwood ‏@nicklockwood Sep 10

So then in the Finder preferences I found the "Show all filename extensions" checkbox and checked it. My file is still just shown as "foo".
2 likes
Nick Lockwood ‏@nicklockwood Sep 10

It turns out that the file itself has a seperate "Show file extension" option in the info pane. Where is that preference stored? Who knows.
7 likes
Ole Begemann ‏@olebegemann Sep 10

@nicklockwood I would guess it’s stored in an extended attribute on the file. Try xattr -l foo.png.
1 like

‏@mjtsai

@olebegemann @nicklockwood It predates xattrs so maybe in catalog info.

7:03 AM - 10 Sep 2016

Michael TsaiVerified account