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Apple has working installers for 10.10 and up linked here: https://support.apple.com/en-us/HT208052 https://support.apple.com/en-us/HT208052

• saagarjha 6y ago
  It's kind of annoying that the OS X Mountain Lion update that I paid for is no longer available from the App Store…
  • mrpippy 6y ago
    From the App Store app on a 10.13 machine, all of the 10.7-10.11 updates show up in Purchased for me
    • saagarjha 6y ago
      You have the old App Store. The new one doesn't show it…