Mac stuck at loading bar and screen blinking

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Mac stuck at loading bar and screen blinking

Hello so im facing a problem with my macbook pro mid 2014 . Today i turn it on its weird how i left ot at 70% yesterday and now i found it off while it should be in sleeping mode anyways it turned on but at the loading bar it was at 50% then its stuck and the screen starts going black then back to the loading screen this time with a charging icon and same thing again and again without it moving i tried resetting the pram i restarted it several times i unplugged the power and wait for some minutes but nothing i tried first aid and now it goes until 70% and the problem starts over i tried turning it with command S to know what causing it exactly and it gets stuck at a command iosmbuscontroller error - transaction reuse

Posted on Aug 4, 2019 6:05 AM

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Answer 1

Top-ranking reply

BDAqua

Level 10

250,253 points

Aug 5, 2019 6:52 AM in response to YoussefGameplay

Sad to say, it sounds like a hardware problem.

How to Run Apple Diagnostics on any Mac

In some cases, a hardware problem is so severe that you won’t be able to switch your Mac back on. Thankfully, if you can run an Apple Diagnostics or Hardware Test, Apple Support suggests this is a way you can restart your Mac, even if it refuses to switch back on through other means.

Whether you are running an Apple diagnostics (on newer hardware and OS X devices) or a Mac hardware test (on older devices), Apple recommends printing their support instructions on how to run these tests. Once you’ve got the instructions in front of you, Apple recommends going through the following process to diagnose a hardware problem:

For those with iMacs or any desktop-based device: Disconnect all external drives and hardware devices, except for the keyboard, mouse, display, and speakers.
Select Apple Menu > Restart.
Press and hold the D key when the Mac is restarting.
Apple Diagnostics will run automatically. When it is complete, it will present a list of the problems encountered.

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Answer 2

BDAqua

Level 10

250,253 points

Aug 4, 2019 3:53 PM in response to YoussefGameplay

Yes, there is a certain amount of danger, tr this..

Does it boot to Single User Mode, CMD+s keys at bootup, if so try...

/sbin/mount –uw

/sbin/fsck -fy

Repeat until it shows no errors fixed.

(Space between fsck AND -fy important).

Type : /sbin/fsck -fy

Type : /sbin/mount – uw / this will mount your file system

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Answer 3

BDAqua

Level 10

250,253 points

Aug 4, 2019 11:32 AM in response to YoussefGameplay

Sounds like Video card problems...

Safe Boot from the HD, (holding Shift key down at bootup), does the problem occur in Safe Mode?

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Answer 4

BDAqua

Level 10

250,253 points

Aug 4, 2019 7:37 AM in response to YoussefGameplay

Have you blown the dust out lately? Does it feel hot?

Do you have a Time Machine backup?

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Answer 5

Aug 4, 2019 6:07 AM in response to YoussefGameplay

Here is a pic of the internal problem please help i can't just reinstall everything and lose my data knowing i haven't installed no update no software for like more then 2 months so i dont see them causing anything

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Answer 6

Aug 4, 2019 7:40 AM in response to BDAqua

Hello no I haven't blown any dust lately concerning the heat its normal and fkr the time machine i tried doing it kept searching but no result i guess im going to reinstall macos and then try to recover some of my files because its seems like a serious problem

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Answer 7

Aug 4, 2019 11:09 AM in response to BDAqua

Hey just a quick update i reinstalled macos and when i tried login the problem persist it still flickering at 75% so i dont see what should i do ? Should i erase all of my disk and start over or what ?

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Answer 8

Aug 4, 2019 11:28 AM in response to YoussefGameplay

I noticed that the screen start blinking when it arrives at a point where usually the mac kinda reduce the brightness and let me in vut now it kinda reduce the brightness and goes black to start blinking

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Answer 9

Aug 4, 2019 12:06 PM in response to YoussefGameplay

https://mrsystems.co.uk/blogs/news/too-many-corpses-being-created

I tried this but still not working im really afraid i erase everything on the disk and endup with the same problem while losing all my files

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Answer 10

Aug 4, 2019 11:10 AM in response to YoussefGameplay

It pops like this for one second then goes black

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Answer 11

Aug 4, 2019 11:48 AM in response to BDAqua

This is the code now i will try the safe mode thank you for the reply

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Answer 12

Aug 4, 2019 11:53 AM in response to BDAqua

I tried holding the shift key but i did not notice anything same thing happened

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Answer 13

Aug 4, 2019 1:17 PM in response to YoussefGameplay

i managed to get the code behind the blinking and it showed this and kept blinking while command + S mode

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Answer 14

Aug 4, 2019 3:58 PM in response to BDAqua

I really appreciate your reply im gonna try that a soon as the macos installing ends im doing it again trying my luck lol i will keep you updated thanks again

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Answer 15

BDAqua

Level 10

250,253 points

Aug 4, 2019 7:46 AM in response to YoussefGameplay

Reinstalling shouldn't bother your data, just replace the System's files.

For safety you may want to Reinstall to an external drive, boot from that & see if you can migrate all your data over.

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Mac stuck at loading bar and screen blinking

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