What will happen to changes made to folders such as/System or /bin (full list here) when upgrading to El Capitan or Sierra?

  • As these have always been Apple controlled folders I would expect that any upgrade even before SIP would replace them all with what should be there for the new OS. I don't think SIP changes this behaviour – Mark Jul 15 '17 at 20:11
  • @Mark I'm talking more like things added to /System/Graphics/ or kexts added to the /System folder. They haven't been touched by previous upgrades. – lightbord Jul 15 '17 at 20:22

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