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The first software I ever sold online was an app that would change the creator code of a file to whatever application you wanted. For some reason, there was no obvious built-in way to do that in Mac OS 8 (besides opening the document in the other application and saving it, or changing it in ResEdit).

I only ever sold one license, but I was 12, so I was pretty excited.



If that can be done, doesn't it defeat the purpose here? Anything can create a file, and then change this tag to 'system' or whatever.


Mac OS 8 dates to the 90s. Nowadays these things are probably public key signed, but back then they probably were not.


Back then, public key signing of any strength was considered a munition.


But why would they?




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