Just over a week after officially launching OS X Yosemite 10.10.3, Apple today made available to users the Supplemental Update for OS X Yosemite 10.10.3.
The Supplemental Update for OS X Yosemite 10.10.3 fixes a video driver issue that may prevent the Mac from starting up when running certain applications that capture video.
The very small update is available both from the Mac App Store and directly from the Apple website.
Apple has also started testing the OS X 10.10.4, with a first beta version (14E7f) released for developers. For now, there is no detail about this new Yosemite update other than Apple citing that it ?improves the stability, compatibility and security of your Mac?.