Actually, EULA use term "Apple-labelled".
Any box with a label containing word "apple" or a picture of an apple conforms to this requirement.
Apple Inc. employs world-class designers and marketing people, solid engineeers but employs lousy lawyers.
It is worth repeating that Hackintosh builders actually purchase legitimate software from Apple.
That actually is false; it is pushed by the Hackintosh community but it is not legal. "Labeling" has legal definitions just as does "branding." The label that Apple is referring to is the actual company label that tells you the manufacturer's model, model number, serial number, etc. If a computer does NOT have an Apple label (not brand, picture of an Apple, or the word "Apple") then OS X may not be installed on it.
Here is an example of the Apple labelled label on a modern iMac:
And here is the legal, Apple-labelled MacBook Pro label:
That is what is meant by Apple-labelled computer.