Good luck, and let us know how it goes! Report your results here. Testing is now underway- this post will be updated.
The updated 10.10.5 Install OS X Yosemite App can be found in the Applications folder. When the download finishes, the app will automatically open. Install OS X Yosemite App Updated - If you downloaded Yosemite from the App Store prior to today, and you want to have the latest version on your backup installer USB, simply log into the Mac App Store and click Download.X99 kernel and chipset support still absent - Haswell-E and X99 temporary guide remains necessary.If you use Clover or VoodooHDA, you may not need to make any modifications.If using Chimera/MultiBeast you will have to reinstall AppleHDA using MultiBeast before or after reboot.This update will replace your audio drivers.
NVIDIA Alternate Graphics Drivers have been updated for 10.10.5.If you use patched or modified drivers, you will need to re-apply changes to the updated drivers.Updated Intel, NVIDIA, and AMD graphics drivers.Click here for general Media Composer OS compatibility information.Building a CustoMac Hackintosh: Buyer's Guide.NOTE 2: If you are using RED, then you also need to upgrade to the latest release ADDITIONAL NOTE 1: This issue is fixed in Media Composer 8.4.x.
If possible, customers with these CPUs should stay on Mac OS 10.9.5 as it does not exhibit the same performance issues.