Macbook Software Update Black Screen. 24 2011 327 pm. Try to start up from macOS Recovery.
While other times the culprit is certain apps that sneak into the auto startup list and affect your MacBooks booting. If you have recently update or upgrade the Mac operating system or any other software the black screen issue might be caused by a software incompatibility. For this reason we need to update all apps to their latest versions including the macOS.
Enter your password a surprising trick that works.
In the three years of using my MacBook Air I have never had any major problems with it. NVRAM stores things like screen resolution time zone information and crucially which hard drive to boot from. Apple has released a software update for OS X Lion that is supposed to address a black-screen bug in 2010 MacBook Pro systems. If your Mac appears to be stuck on a blank screen follow these steps.