Cannot change system apps' icnons

[Ryan Zhu]

Cannot modify '/System/Applications/Calculator.app': you do not have write permissions.

[West Wong]

new macOS has a base image which can't change, can't change system app icon now

[Michael Klement]

Thanks, @westwong0622. Indeed, even with sudo you cannot modify apps in /System/Applications - verified on macOS 12.5.1 (Monterey).