I managed to install Yosemite on my Samsung 5 Series notebook. The specs are the same as here, http://www.samsung.com/us/computer/pcs/NP520U4C-A01UB-specs, except that I replace the network card with the Atheros AR9285. Everything is working with the exception of the sound and graphics. The screen load in 1366x768 but flickers and is slow to refresh. About this mac shows the graphics as "Display 4 MB"
about this mac:
graphics --
Display:
Type: GPU
Bus:...
Graphics Flickering: NP520U4C-A01UB - Yosemite
about this mac:
graphics --
Display:
Type: GPU
Bus:...
Graphics Flickering: NP520U4C-A01UB - Yosemite