Window System Icon for Emacs

Is there a way that I set the window icon for Emacs from the command line when I invoke emacs or else while emacs is running? ​ I am currently using: gnu 28.1 Montery MacOs

I think on Cocoa/GNUstep apps get their icons from .app so unless their is a built-in to override app icons in OS X you will have to change the icon inside the emacs.app folder.

??? so if I want to have several emacs running at once with different icons, i would need to have separate app folders (and presumably a lot of symlinks -- smile) ???

What ??? Write proper sentences. Search for what is an app folder os x if you don't understand what I mean.

Sorry to be unclear. I want to run more than one emacs at a time. I'd like each to have a different icon. If emacs is going to rely on the relative position in the file system to find the bitmap file, then it seems i am going to need to have a separate application folder for each emacs that I want to run. Since these folders will have the same files other than the single bitmap file, I expect that I can use symlinks for everything other than that one file.

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