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Since I migrated to a new iMac Retina recently, I noticed most applications, including system apps, are no longer called <AppName> but <AppName>.app in several places, such as Finder > Open With:

enter image description here

It doesn't look right to me and I can't imagine this is how Big Sur would normally behave. Could it be a peculiarity of my migration from Catalina, or is it a setting, or linked to a setting I have changed with this unintended side-effect?

nohillside
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Mr. Boy
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    Did you turn on Display File Extensions? That setting is interface-wide. – Marc Wilson Aug 17 '21 at 21:05
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    Finder > Preferences… > Advanced > [] Show all filename extensions – user3439894 Aug 17 '21 at 21:11
  • @MarcWilson not intentionally, unless its behavior is different between Catalina and Big Sur and it got migrated across – Mr. Boy Aug 17 '21 at 21:11
  • @user3439894 Thanks, I couldn't remember what the exact title was. I have a Hazel rule that sets it on files in directories I want to see them in so that I don't have to look at them in the interface. :) – Marc Wilson Aug 17 '21 at 21:14
  • @MarcWilson this is indeed it, slightly irritating it is so system-wide. After all, when I choose "open with" they are all applications :) But it is an easy answer though I'm unsure if it's a tweak in Big Sur – Mr. Boy Aug 17 '21 at 21:15
  • It makes more sense that it'd be interface-wide, vs chasing random checkboxes in different parts of the interface which would just be annoying. Since you can set a per-file attribute to show the extension, I just have Hazel set the attribute on any file created in $HOME or subdirectories. – Marc Wilson Aug 17 '21 at 21:24
  • It makes sense it would apply in all Finder windows (including open/save file). I guess the "select application" window is using Finder behind the scenes but it's clearly not particularly useful to show me the file extension in this case. Might even be a simple bug rather than deliberate. But that's beside the point, if @MarcWilson wishes to supply a short answer I'll accept it (otherwise I'll add it) – Mr. Boy Aug 17 '21 at 21:29
  • I have complained to Apple about them changing preferences during updates. But I have never seen them turn that one on. They did turn it OFF on me once when I had intentionally turned it on. – WGroleau Aug 18 '21 at 00:53

1 Answers1

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Finder > Preferences > Advanced > [] Show all filename extensions

This is an interface-wide setting, any display of a filename will display the associated extension.

If desired, a per-file setting is available in that file's Get Info dialog from Finder.

Edit: Adding a screenshot showing what I have Hazel doing as I mentioned above. This runs on both my Documents directory and my Google Drive directory.

enter image description here

user3439894
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Marc Wilson
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