Library/Homebrew/requirements/unsigned_kext_requirement.rb


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require 'requirement'

class UnsignedKextRequirement < Requirement
  fatal true

  satisfy { MacOS.version < :yosemite }

  def message
    s = <<-EOS.undent
      Building this formula from source isn't possible due to OS X
      Yosemite and above's strict unsigned kext ban.
    EOS
    s += super
    s
  end
end