Black screen on start-up

[Bley]

Hello all..

I have a problem with installing Windows 10 on my mac.

I am running Sierra 10.12.6 on a Macbook pro, mid 2012, 2,9 ghz Intel Core i7

This is what I have done so far:

1. Downloaded the Win10 64 iso file from Windows hp.
   
2. Put in a 16gb flashdrive in my Mac
   
3. Ran Boot Camp (clicked yes in all three options)
   
4. Partition the hard drive (150 gb for Windows)
5. Reboot (the Mac did it by itself)
6. BLACK SCREEN - like NOTHING is happening

I can then restart and holding "alt" down. When choosing booting from the flash drive Windows starts up.

It says: Windows can not be installed on this disc. The choosen disk has a MBR partitions table. On EFI-systems Windows can only be installed on GPT-discs...

Arhhhhh...help???

Cheers from Copenhagen

 

[z970]

You formatted the Boot Camp partition from the Windows installer, right? It's the little button with an eraser in your photo.

 

[Bley]

You formatted the Boot Camp partition from the Windows installer, right? It's the little button with an eraser in your photo.

Yes..that it did!

 

[z970]

Maybe try going back into OS X and partitioning the HD via Boot Camp again? Then format it to NTFS via the Windows installer.

That may yield some results.