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Yesterday Apple released Security Update 2015-002 for OS X 10.10.2 Yosemite. Update any supported system using the built-in Software Update functionality through the Mac App Store, or by using the standalone installer available from Apple.com.
This update is unlike other Security Updates as it contains an updated kernel and OS X build number (14C1510). This requires the system to reboot after installation, and can cause issues for those using a patched kernel or alternate NVIDIA drivers. Please read through the following.
NVIDIA Alternate Drivers
If you run the NVIDIA Alternate Drivers for 10.10.2, changes the OS X build number to 14C1510. Therefore the NVIDIA drivers package doesn't recognize it as a valid OS version.
UPDATE: NVIDIA HAS RELEASED A NEW DRIVER PACKAGE 343.02.02f03:
http://us.download.nvidia.com/Mac/Quadro_Certified/343.02.02f03/WebDriver-343.02.02f03.pkg
NVIDIA should update the drivers package in the next day or two, but if you find yourself unable to install the drivers, you can temporarily modify the build number as shown here.
http://www.tonymacx86.com/graphics/...ity-update-2015-002-broken-2.html#post1000340 - Post 12
Or you can modify the NVDAStartup.kext as shown here:
http://www.tonymacx86.com/graphics/...ity-update-2015-002-broken-3.html#post1000507 - Post 24
Or install older beta versions of the drivers as shown here:
http://www.tonymacx86.com/graphics/...ity-update-2015-002-broken-3.html#post1000536 - Post 25
Kernel
If your system requires a patched kernel in order to provide enhanced support for X99 systems, it will need to be re-patched. You may need to boot into the UniBeast installer in order to use the Terminal to re-patch the kernel. Please follow the instructions here for full details:
www.tonymacx86.com/yosemite-desktop-guides/143849-haswell-e-x99-motherboard-temporary-guide-os-x-10-10-a.html
Good luck!

This update is unlike other Security Updates as it contains an updated kernel and OS X build number (14C1510). This requires the system to reboot after installation, and can cause issues for those using a patched kernel or alternate NVIDIA drivers. Please read through the following.
NVIDIA Alternate Drivers
If you run the NVIDIA Alternate Drivers for 10.10.2, changes the OS X build number to 14C1510. Therefore the NVIDIA drivers package doesn't recognize it as a valid OS version.
UPDATE: NVIDIA HAS RELEASED A NEW DRIVER PACKAGE 343.02.02f03:
http://us.download.nvidia.com/Mac/Quadro_Certified/343.02.02f03/WebDriver-343.02.02f03.pkg
NVIDIA should update the drivers package in the next day or two, but if you find yourself unable to install the drivers, you can temporarily modify the build number as shown here.
http://www.tonymacx86.com/graphics/...ity-update-2015-002-broken-2.html#post1000340 - Post 12
Or you can modify the NVDAStartup.kext as shown here:
http://www.tonymacx86.com/graphics/...ity-update-2015-002-broken-3.html#post1000507 - Post 24
Or install older beta versions of the drivers as shown here:
http://www.tonymacx86.com/graphics/...ity-update-2015-002-broken-3.html#post1000536 - Post 25
Kernel
If your system requires a patched kernel in order to provide enhanced support for X99 systems, it will need to be re-patched. You may need to boot into the UniBeast installer in order to use the Terminal to re-patch the kernel. Please follow the instructions here for full details:
www.tonymacx86.com/yosemite-desktop-guides/143849-haswell-e-x99-motherboard-temporary-guide-os-x-10-10-a.html
Good luck!
