It hasn’t been too long since Apple released OS X 10.10.3 with the all-new Photos app, but it looks like a supplemental update was necessary to fix some issues.
One issue, specifically. Apple has just released a supplemental update for OS X 10.10.3 that’s meant to fix a startup issue with video drivers. The update is available right now through the Mac App Store, and as usual it’s a free download.
Some users have also been complaining that viewing large JPEG images in OS X 10.10.3 has caused their systems to shut down or restart unexpectedly, but this update does not address that complaint.