iMac Pro doesn't boot

Pangalactic

macrumors 6502
Original poster
Nov 28, 2016
368
605
So, long story short - I was trying to use bootcamp to create a windows partition. Bootcamp gave out some error at the end. I've tried booting into disk utility (restart + cmd + r) to resize the now useless 300GB windows partition, but Mac didn't allow to do that. So I've decided to format the whole disk.

Now the Imac is stuck in an endless windows boot cycle: it starts to load up the windows installation, then stops because it cannot find the drivers. MacOS doesn't load up at all.

Things I've tried:
1) create bootable MacOS USB flash drives and boot through holding opt (I don't have a Mac laptop so I've used TransMac on Windows). The Imac doesn't see the USB sticks for some reason at all.
2) cmd + r : it does open up internet recovery, but once I enter the wifi login/password, I just get a spinning globe with no progress bar. Has been for one hour like this so far.
3) cmd + opt + p + r to reset PRAM - doesn't do much.

Any ideas on what else can I try to fix it?
 

vertical smile

macrumors 68040
Sep 23, 2014
3,916
5,116
Do you have another Mac to test the USB boot drive? Some thumb drives cannot be used as a boot drive.
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2) cmd + r : it does open up internet recovery, but once I enter the wifi login/password, I just get a spinning globe with no progress bar. Has been for one hour like this so far.
I thought internet recovery was Alt+CMD+R

Give that a try?
 

Pangalactic

macrumors 6502
Original poster
Nov 28, 2016
368
605
Do you have another Mac to test the USB boot drive? Some thumb drives cannot be used as a boot drive.
Unfortunately I don't. I've got 2 different USB drives though so hopefully that is not the issue

I thought internet recovery was Alt+CMD+R

Give that a try?
Yes, I've tried that, getting the "internet recovery" spinning globe without the progress bar. Which I assume is not working.
 

Pangalactic

macrumors 6502
Original poster
Nov 28, 2016
368
605
Some thumb drives cannot be used as a boot drive.
Never mind, I've just solved it through perhaps the most ridiculous method possible - create a Windows Virtual Machine, emulate MacOS, and then create a bootable MacOS installer through that, worked like a charm :D