New iMac and the slow Windows File Share discovery (via Gary Caldwell’s Blog)

Perhaps his solution will work for you. In terminal type:
sudo sysctl -w net.inet.tcp.delayed_ack=0
So I finally did it and bought a new 27 inch iMacquad core to be my primary machine. I did the whole deal and upgraded Parallels to the new version 6.0 and installed a fresh lovely copy of Win 7 inside of it, complete with Zune. Everything works great. The machine flies and Win 7 is very happy and responsive running all the time and going full screen whenever I need it to. Only one problem so far. Browsing video files on my Windows Home Se … Read More