Hi all - really struggling with this. Ive installed a Cat6 home network which all seams to be working fine, I'm using a TP Link 16 port switch. When I plug in my 2009 mac book pro I'm getting Gbit speed reported. However when I take that same patch cable out of the MBP and plug it into the iMac (2011) Im only getting 100 Mbit/s! Same cables, same switch, same ethernet wall ports. Ive tried changing System Preferences > Network > Advanced> Hardware from Automatic to 1000BaseT but then the connection fails. I am at a loss! Can anyone help me out please? Thanks loads in advance. Andy.