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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?

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    Did you turn on Display File Extensions? That setting is interface-wide.
    – Marc Wilson
    Commented Aug 17, 2021 at 21:05
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    Finder > Preferences… > Advanced > [] Show all filename extensions
    – user3439894
    Commented Aug 17, 2021 at 21:11
  • @MarcWilson not intentionally, unless its behavior is different between Catalina and Big Sur and it got migrated across
    – Mr. Boy
    Commented Aug 17, 2021 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
    Commented Aug 17, 2021 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
    Commented Aug 17, 2021 at 21:15

1 Answer 1

Reset to default
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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

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  • Thanks. Not come across Hazel before, sounds useful.
    – Mr. Boy
    Commented Aug 18, 2021 at 10:21

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