color bar line on start up, then black screen, then startup is fine

Question

Bman2912 Author

Level 1

11 points

color bar line on start up, then black screen, then startup is fine

macOS Sierra - macOS 10.12 Beta (16A294a)

MacBook Pro (15-inch, Early 2011)

2.2GHz MacBook Pro (MC723LL/A)

Intel Core i7

Intel HD Graphics 3000 -512MB and AMD Radeon HD 6750M (1024MB) with automatic graphics switching

Processor: 2.2GHz

Memory 16GB 1333 MHz DDR3

Start Up Disk: 1TB - Samsung 850 SSD

Graphics - Intel HD Graphics 3000 512mb & AMD Radeon HD 6750M - 1024 MB

Here is the situation - When I initially push the power button - the screen comes on, apple logo come up, start up bar starts filling in across the screen and at the 1/2 way point I get an odd color line (pic 1).

Then the screen goes black for a second or 2 (pic 2).

Then boot up bar comes back on and completes. (pic 3)

Then I can log in. (pic 4).

Other than the log in issue, there does not seem to be any other issues. Systems has passed diagnostics. I have reset NVRAM & SMC.

Anyone know what is going on?

Any help is appreciated. I purchased the MBP, used, from a seller on Amazon.

Thank you.

Thank You.

iMac, OS X Yosemite (10.10.1), 32G Ram, i5 Intel Processor

Posted on Aug 16, 2016 10:10 AM

Reply

Answer 1

Jan 12, 2017 10:58 AM in response to Bman2912

Same error here.
Macbook Pro Late 2011. It started after doing the last upgrade to 10.12.2 (16C67). Also I'm having some issues to connect my ultra wide external monitor after this. 😠 If I recall, during the installation there were some of this "bar/lines" as well.

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Answer 2

Feb 13, 2017 3:29 PM in response to Bman2912

Did you ever figure this out Bman?!? I've had this issue on 2 DIFFERENT MacBook Pros! Both of them had the same result. The issue with the horizontal line and black screen at start up DID NOT happen in either MBP when I used a standard SATA hard drive, BUT when I used a SSD (solid state hard drive) in both MBPs the issue occurred with the horizontal line and black screen at the startup. WHY?!? This shouldn't be happening.

I've tried upgrading firmware on the SSDs and there don't seem to be any other troubleshooting methods available. Please advise.

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Answer 3

Apr 26, 2017 3:19 PM in response to Bman2912

Hi! I have the same exact problem on my 17" MacBook pro, same year as yours. How can I install an older software to eliminate this problem? Please help me, I'm on deadline and the nearest apple service center is at 100 miles from where I live.

many, many thanks!

Ceci

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Answer 4

Apr 26, 2017 9:45 PM in response to iwidesign

HI, I had this same problem with my MacBook Pro and MacOS Sierra (software update). Lines running across the second grey screen and getting frozen. I tried everything and nothing worked but reinstalling the previous operating system.

How to do it? Press option + command + R when restarting and the internet system recovery will install the operating system that suits your computer.

good luck!

Ceci

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Answer 5

Oct 20, 2016 9:23 AM in response to Bman2912

I had this issue too but it is now resolved at the Apple store. They had seen it before on older hardware that was upgraded to Sierra with FireVault turned on and occurs when the OS is switching graphics modes. I just had my logic board replaced so wanted it resolved.

We tried turning off FireVault but the issue was still there. They then successfully installed a fresh copy of an Mavericks and the issue was gone. Then they installed a fresh copy of Sierra and the issue was still gone. Now I have re-enabled FireVault and the issue is still gone.

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Answer 6

kronil

Level 1

4 points

Nov 6, 2016 12:56 PM in response to Bman2912

Do you solve this problem? I have the exact same issue and i the one thing that i didn't try is clean install.

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Answer 7

nrios81

Level 1

9 points

Dec 15, 2016 3:30 PM in response to efffourthirty

So did the clean install resolve your problem or did it come back? I also did a clean install and it did not appear but after resetting the nvram/pram it came back. I have an early 2011 15" MacBook Pro with the radeon graphics card.

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