Hello, I would ask help from you for I am with two problems. First, I install Yosemite 10.10.1 Niresh on my AMD Athlon II X2 270. The installation and after installation occur seamlessly, sound, internet, video everything ok. However when I try to open pictures, anything they get with pink stripes. It sucks, because I can not open any photo. The second problem comes when I try to solve the first. When I try to update my Yosemite to 10.10.3 or 10.10.4 the sound and the Internet no longer work. No matter how many times I reinstall the kexts, will not start at all. But the problem with pink stripes over. I managed to find kernel for any of the two versions of Yosemite, but it's no use to update and make no sound and internet. In short, I install 10.10.1 and everything works except the images that are bugs, I update and images look good, however the internet and sound to. My specs: Processor: AMD Athlon II X2 270, 3415 MHz Motherboard: ASRock N68-S3 FX 4GB memory Video Card: NVIDIA GeForce 8400 GS (VEN 10DE DEV 10C3) Audio: nVIDIA nForce 7025-630a - High Definition Audio Controller (VEN 1106 DEV 4397) Ethernet: nVIDIA nForce 7025-630a - LAN Controller (PHY Realtek RTL8201CL / CP) (VEN 10DE DEV 03EF) I use the Chameleon as Bootloader. my Boot.plist <key>EthernetBuiltIn</key><string>y</string><key>Graphics Mode</key><string>1024x768x32</string><key>GraphicsEnabler</key><string>y</string><key>Kernel Flags</key><string>npci=0x3000 debug=8 ahcidisk=1 dart=0</string><key>USBBusFix</key><string>y</string><key>Legacy Logo</key><string>Yes</string> If anyone can help me with either of the two problems, I appreciate it, not take it anymore reinstall Yosemite many unsuccessful attempts to solve it. Thank you Sorry for my English.