Apple release the 10.8.4 update to it’s popular operating system a few days ago.
The fixes in this version are fairly minor with no extra edits needed on the Hackintosh project. The AppleHDA driver was replaced in the upgrade, so applying the sound driver from MultiBeast was necessary to get audio to work on the on-board chipset. Download the latest version of MultiBeast here (login required).
Details on what is included in the update since 10.8.3 can be found here. The update can be downloaded through the App Store.
As always, running a system update on non-apple hardware is not always 100% bullet proof. Make sure that you have another way to boot the system if something goes wrong. Multibeast may be needed on your setup.