What I've found is that if I leave the MBP switched on at the black screen, plugged in to AC, eventually it will boot. So my system log only showed successful boot and shutdowns with none of the failed in-between attempts! But the boot process never reaches the point of logging anything. I've run in verbose mode to see if I could track down from the system log anything that might be causing the problem. Something has happened to the firmware during the Big Sur install.Īdvice to reset NVRAM/PRAM or SMC does little good, though it may have eventually given me back the chime, even if it never got any further than that. I have since reinstalled Catalina but the boot problem still persists. Just don't ever reboot if you're in a hurry. No chime, no nothing to indicate if anything was happening.Įventually the machine did boot and installation completed.
None of the recovery options work because the machine never gets as far as booting up.
Can you mirror ipad to mac on 2014 macbook pro pro#
I have a late 2013 MacBook Pro which went to the black screen when rebooting during installation of Big Sur. The company adds that the Support Pages document will be updated when it has a more comprehensive solution.īig Sur saw release last week, but the launch was quickly marred by installation, app runtime and cascading server issues. Resetting NVRAM and PRAM requires users to shut down their machine, hold Option, Command, P, and R until the Apple logo appears and disappears twice, or about 20 seconds.Īpple instructs MacBook owners to contact Apple Support if the above techniques do not work. Next, users hold all four keys for another seven seconds, release them, and press the power button to turn on their Mac. To reset the SMC, users must simultaneously press the Control and Option keys on the left side of the keyboard, and Shift on the right side of the keyboard for seven seconds, then also depress the power button. If the issue persists, reset NVRAM or PRAM.If the issue persists, reset the SMC as described for notebook computers with a nonremovable battery.Unplug all external devices from your Mac, including any displays and USB accessories, and remove any card inserted in the SDXC card slot.Press and hold the power button on your Mac for at least 10 seconds, then release.If an impacted Mac does not start properly, Apple says to:
Attempts to use Apple's Internet Recovery tool have also been unsuccessful.Īpple in today's Support Pages document acknowledges the issue and offers a potential workaround. Specifically, updates in some cases result in a permanent black screen or a screen bearing a circle with a line through it, a problem that does not resolve itself when restarting the machine in Safe Mode.
According to reports earlier this week, some users are facing issues when installing Big Sur on their 13-inch MacBook Pro from late 2013 or mid 2014.