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Jubilantly

macrumors newbie
Original poster
Sep 1, 2024
3
0
UPD: I managed to solve the problem by creating a new volume (partition) on my internal drive where I installed the new macOS via recovery mode and was able to get into the system. Then moved all data/files to the new volume and deleted the old one. Everything is working now. Looks like the problem was purely with the system part of the past disk volume.

***

Hello everyone,

Out of the blue, my 2017 iMac Pro stopped booting. The Apple logo appears, it progresses to about 50% (within a minute), and then it just stops without any further action.

When I try to boot in Safe Mode (by holding Shift), nothing changes. Attempting to boot with Command + V (Verbose Mode) causes it to hang at a certain point (see the attached photo).

Here’s what I’ve done so far:

1. Reset the SMC and NVRAM.

2. Checked and repaired the disk using Disk Utility (twice).

3. Reinstalled macOS to the current version (the reinstallation completes successfully, but the system still doesn’t boot).

4. Ran Apple Diagnostics three times, which supposedly should reveal any hardware issues—everything came back normal.

The screen works fine, sound works, bluetooth devices (mouse, keyboard) work too, recovery mode starts without any problems.

I’m completely at a loss as to what the problem could be and how to fix it. Visiting an Apple Store isn’t an option (there’s none in my country), and I’m hesitant to take it to a dubious repair service. I’d appreciate any insights into what might be causing this issue or any other ways to gather more information on why this is happening and how to resolve it.
 

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Last edited:

Bigwaff

Contributor
Sep 20, 2013
2,693
1,809
Reinstalled macOS to the current version (the reinstallation completes successfully, but the system still doesn’t boot).
Current version exactly being?

Appears to be related to Thunderbolt bus… at least when logs stop. What TB peripherals did you have attached?
 
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Jubilantly

macrumors newbie
Original poster
Sep 1, 2024
3
0
I was faced the same issue with my imac 2017. You can tried these simple methods: Try creating a bootable macOS on an external drive. If your iMac boots from that, it might point to an issue with your internal drive. Target Disk Mode: If you have another Mac around, you could try booting your iMac into Target Disk Mode and connect it to the other Mac. This can help you access your files or run further diagnostics. Hardware Check with Third-Party Tools: If Apple Diagnostics didn’t show anything, you could try a third-party tool like TechTool Pro or DriveDx to see if they pick up on any hardware issues that Apple’s tool missed.

If you problem cannot solved with these method i would recommend you to visit the nearest apple service center.
Thanks for the reply, I was able to solve the problem. I've updated my post on what personally worked for me.
 

Jubilantly

macrumors newbie
Original poster
Sep 1, 2024
3
0
Current version exactly being?

Appears to be related to Thunderbolt bus… at least when logs stop. What TB peripherals did you have attached?
Thanks for the reply, I was able to solve the problem. Fortunately it was not the ports, the problem was that the existing disk volume did not want to start the system.

Updated the post to help others if they have a similar situation.
 
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