How to Clean Install Mac OS

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Install Mac OS Sierra GM Today
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Install Disk Creator:

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  1. What is the release number from the App Store? I'm patching it to run on an unsupported MBP and want to make sure I'm not reinstalling a GM version. Thanks!

  2. Litte Question@all: I have MBP and did clean Install of latest macOS Sierra GM. Do I have to download again 5GB Installer of macOS Final this Day? Or can I stay at may GM-Release (which is final too) – and will I get further Updates on it?

  3. what about my apps which are already in my mac will be erased right . but if i do have backup then my apps will be back as well as other data or not .. thanks in advance..

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