Macbook pro retina 13 inch, 2015, yosemite vs. mavericks

I noticed that some retailers are listing the Macbook proretina 13 inch 2015

Model: MF839LL/A

as having yosemite and others say mavericks. Why would they be different if the model # is the same?

Posted on Jan 3, 2016 1:20 PM

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Macbook pro retina 13 inch, 2015, yosemite vs. mavericks

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