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2.3GHz, 2.6GHz, or 2.7GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.7GHz) with 6MB shared L3 cache.

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Stuck on boot progress bar

Hi,

I have recently replaced the battery in my Macbook Pro . After the battery change I did a boot and the laptop was working fine. So I decided to change the thermal paste too due to the high idle temperatures.

After reapplying the thermal paste I can’t boot into the OS anymore.

When booting I am only presented with an Apple Logo and the progress bar. With a normal boot the progress bar will move to the middle of the apple logo.

In safe mode boot the progress will move up till 3/4 of the bar.

Block Image


I have tried SMC, NVRAM, PRAM resets, and internet recovery. And nothing seems to be working :

Ran hardware check and there seem to be no errors

Running in Verbose mode it gets stuck on this line

Block Image

I am currently downloading OS X Mountain Lion and will try boot from a USB. The mac was running on macOS Mojave before.

Any idea what is going on? Is there a chance of a messed up sensor on the motherboard :( ?

Any suggestion is appreciated :)

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Start up in Repair Mode and run Disk Utilities;

To use Recovery Mode, reboot or start your Mac and hold the Command and R keys simultaneously on your keyboard as soon as you hear the familiar startupchime. Keep holding as your Mac boots, which may take a few moments depending on its specific configuration.

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While trying to load into recovery mode the progress is still stuck. There are some purple bars running across the screen while trying to boot into recovery. I think there is something wrong with the GPU

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Do you have the original hard drive? This is sounding like a problem present in the 13" machines. Please check to see exactly which machine you have. You can input the serial number from the back cover here: https://everymac.com/ultimate-mac-lookup...

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