I have problems with LAN connection between 4 hacks, connected through switch: 3 running z77x-ud5h connecting to z97x-ud5h which shares files. It worked quite well in Maverick, although with lower speed than Gigabit ethernet it could use. Since Yosemite, everything gone to ****e. Finder freezes, high write speed and low read speed, access not granted, or lightning fast dowload but not working upload, random disconnections, no cable plugged, everything. I downloaded all-in-one netwrok drivers from hackintosh.org, and it seems it kinda work, but I am afraid it will stop after few hours of exchanging large files(multilayer photoshop files).
If ANYONE have idea how to make LAN working with no hiccups, i beg for info.
EDIT: turns out that for Z77x-UD5H there is no better ethernet kext than old mountain lion hnak drivers from Multibeast 5.0.2.