Trying to connect two Macintoshs with a Ethernet cable (capable of Gigabit speed, of course) will not automatically set a gigabit connection. Instead of this, a 100MB connection is established. Does anybody knows why? After a thousand searchs at google, and trying with a bunch of machines, I still on limbo. Both ports are capable and set to Gigabit speed, imho. Thanks for any advice, answering or any way I should/could improve this question.
Both Macs tested are: Both iMac (late 2011+), iMac + MacPro (Late 2009+) All machines running Yosemite full updated.