What next? Sep 28, AM. I attempted to repeat the original tips but executing them prior to the occurrence of the chime. After pressing the power button and before the chime I pressed the command, option, P and R keys and held them for 3 minutes. As before nothing happened. I restarted the MacBook Pro and before the chime pressed command and shift keys and held them for 3 minutes. Again, nothing happened. Once again nothing happened. Any other thoughts? Tomorrow morning I will try contacting Apple Support. Sep 28, PM. Something is definitely not right. Is this a MBP as it says in your profile?
Using the built-in keyboard? If it is a Bluetooth keyboard there is always the doubt if the system is "seeing" the keyboard soon enough for those keys to take effect. Sep 29, AM.
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I Will try to clarify. I pressed the power key. Before the chime occurred, I pressed and held the command, option, P and R keys. The chime occurred as usual at a few seconds, but I continued to hold the keys in for 3 minutes. As I indicated, nothing happened.
I am using a MacBook Pro 6,2 mid with built-in keyboard. The computer never passes the white screen phase. By keeping the keys down, the normal response of the system should have been to chime, and then chime again, and again every few seconds until you let go of the keys. It seems that this is not what you are seeing, so I am suspecting the chime you hear does NOT indicate the NVRAM reset, but it is proceeding to the normal boot process, which is failing. You may try yet another thing, that is to reset the SMC system management controller , then try again the reset NVRAM and see if something has changed.
If not, then you may have to take the machine to an Apple store or authorized repair shop and let them take a look at it. I read the article and executed the SMC reset sequence.
Nothing seemed to have happened. I repeated the sequence a second time in case I was insufficiently synchronous in the key presses.
Again nothing. I have insufficient time to contact apple now, so l will try tomorrow. Thank you for your thoughts and considerations. Sep 29, PM. Thanks for the suggestion. I contacted the Apple Support folks and we executed a safe boot sequence and a recovery boot sequence.
My Mac won't start: How to fix the white screen issue?
I took the MacBook Pro by itself and the technician linked it to the Apple network by ethernet. He entered a few commands on his tablet to see the software systems I had resident. Then suddenly, the MacBook Pro came to life and all my systems were up and running. He checked out all systems, shutdown, start-up, sleep, wake, etc. Conclusion: everything now working, not sure why. Come back if it recurs. So I returned home, restarted the computer, re-attached the external drives I use for specific memory, and caught up on much of my needed work.
Then I noted that the documents and downloads were no longer in the folders expected.
Best ways to fix a white screen on Mac
The time machine had made two backup changes so I would have to get a backup from before the systems crash. I attempted to do this but when the computer restarted it froze in the white screen after the stars chime. The problem was back. Then I realized that the difference was the addition of the external drives. I unplugged them and lo! So it seems that the problem is that at least my download version of Sierra does not boot up if usb or firewire linked drives are attached. Have you or anyone else heard of this problem? Also, if this is the case then how will I be able to get my desired configuration reinstalled on my HD since my TimeMachine backup is on an external HD?
Oct 1, PM. I tried all the steps but no use. I took bootable siera mac os. I never get hope. And i press option button when i switch the power button again its show install OS then i press to install again it goes to white screen. Dec 9, PM. Feb 12, PM. Jun 2, AM in response to Starr. Jun 2, AM. Jun 2, AM in response to manishkumarjain In response to manishkumarjain. This will allow you to run Disk Utility to test the system drive for problems select the drive and click First Aid. For other hardware, you can learn how to reset SMC on Macs here.
Often replacing a hard disk is in order, some users are comfortable doing it themselves otherwise you might want to contact an Apple Support center for official assistance in replacing the drive or diagnosing whatever other system issue persists. If the other approaches are failing, you may need to reinstall Mac OS system software.
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You should always backup your Mac before doing this. Back up your data ASAP. A failing hard drive is not terribly unusual in the computing world, and I have personally seen a variety of weird errors when a MacBook Air SSD was failing, including booting to a white screen, getting stuck on a black screen , the question mark on boot, the folder icon on boot, intermixed with occasional successful boots, all of which was remedied by replacing the SSD in MacBook Air , but the same idea could apply to a MacBook, MacBook Pro, iMac, Mac Pro, or Mac Mini too.
Has your Mac ever been stuck on a white screen during boot? Did you resolve it with the tips above or with a different solution? What specifically worked for you? Let us know in the comments. Enjoy this tip?