Hello! Just got my new iMac i5 and I'm having trouble getting the right upload speed. Download speeds are OK. I have 10/10 mbps lines. I also have a pc, wich the upload speed is fine. I can not get faster upload than 6mbps. Same result using cable and WiFi. I have not touched the default network settings, expet trying various MTU settings, but that did not help. Any suggestions?