Apple has released 10.9.5 today. This updated includes added features to IOS 8 and could be the last major update we see for 10.9. There are no known issues with 10.9.5 regarding Hackintosh’s and should be consider safe to install. Make sure to re-patch your audio with the 10.9.4 patch for the time being.
x99 users please do not update until the kernel is checked.
For those Nvidia users who are having issues with 10.9.5 we have a working solution. This was only tested on a single GPU configuration. Credit goes to Dank0. Install SMBIOS MacPro 3,1 and can be downloaded here for Chameleon Boot Loader. For clover remove the SMBIOS section for MacPro 6,1 from the Config file and then add this code:
Note this is a temporary solution.