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I'm trying to change the Finder icon, I went to

/System/Library/CoreServices/Dock.app/Contents/Resources/

I also have 2 icons ready to replace.

enter image description here

I tried to drag these 2 images up, I saw a block sign.

enter image description here

Then I was thinking, maybe it's locked, but then I don't have any options to unlock it.

enter image description here

How would one change the Finder icon?

I've also noticed, I also can't change Terminal, Message, Stickies, and Mail. :(

enter image description here

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    The System volume is sealed: it cannot be modified.
    – lhf
    Feb 11, 2022 at 1:26
  • So we will never be able to modify our finder icon ?
    – code-8
    Feb 11, 2022 at 1:30
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    Even if you could change the icon, it is almost certain that it would be put back to the default after a macOS update.
    – IconDaemon
    Feb 11, 2022 at 2:12
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    I've also noticed, I also can't change Terminal, Message, Stickies, and Mail. :(
    – code-8
    Feb 11, 2022 at 2:23
  • If you break the 'seal' the Mac will refuse to do anything except run a repair install. Not worth the effort.
    – Tetsujin
    Feb 11, 2022 at 8:25

1 Answer 1

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You can't. Starting with Big Sur, the System volume is sealed: it cannot be modified at all.

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