Bill, I agree with you that the Zenbook is a clone. However, it is a PC clone and NOT an Apple clone. The BIOS is the point of failure in your comment. I beleive it was Compaq that originally reverse engineered the IBM PC BIOS firmware. I was not aware that Apple contained a "BIOS." Arguably, every computer needs basic input output system firmware, but for the Zenbook to be considered an Apple Clone, the system firmware would have to be "nearly identical" as you say. The differences in the system firmware are what make the Zenbook an orange and an Apple an apple.
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