Hello everybody: I told you that I was able to install snow leopard in my Samsung r430 (nvidia 310m) and I did not have any problem to install this (only a nasty noise when the osx stars due to feedback MIC) but when I try to install Yosemite 10.10 or maverick or Lion, I can't install any these OSx. I get the clover screen (I am installing with a bootable usd disk that I downloaded from torrent) but when I choose install the laptop reboot in a few seconds. When I used nv_disable=1, I get the Apple symbol but laptop reboots in a few seconds (four seconds).I have tried boot with Chameleon (I press 1 until to get clover screen and it boots during more time but finally it reboots too. I had a screen from the exact moment when it reboot. Could you indicate something that I can do to fix this issue? Ps: Sorry by my english (It is not my native language) Ps: I have trying install yosemite, maverick, lion with different usb bootable disk. Regards...