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It doesn't. It has 10/100/1000Base-T. You can find specs on all Apple products:

Ethernet Capabilities of Macs



Actually mine is a 2009 model.

What do you mean "It doesn't. It has 10/100/1000Base-T"

I put in my serial number and it said I had....


Built-in 10/100/1000BASE-T Gigabit Ethernet (RJ-45 connector)


Does this not mean I don't have gigabit? I might be confused as to what the difference is but it appears that I do have it.

comments?
 
I think all of the iMacs since the G5 come with gigabit ethernet ports :)
 
All macs since the G4 Gigabit have Gigabit. So that is 12 years now!
Apple was pretty early with this.
 
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