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MB 8.0.1 [Mounting EFI failed.]

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Gigabyte GA-Z77X-UD5H
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intel i7-3770k
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Attempting an El Capitan update from Yosemite. Everything went smoothly using Unibeast UEFI Boot Mode. That is, until I tried to update using MultiBeast to get full functionality. Throws this error:

Multibeast.log:
12/28/16 23:19:42 - Starting MultiBeast 8.0.1-20151119
12/28/16 23:19:59 - Mounting EFI
12/28/16 23:19:59 - Mounting EFI failed. Exiting.

I'm getting nothing in /var/log/install.log related to MultiBeast.

Help appreciated
B
 
Joined
Dec 13, 2012
Messages
5
Motherboard
Gigabyte GA-Z77X-UD5H
CPU
intel i7-3770k
Graphics
NVIDIA GTX670
Mac
Classic Mac
Mobile Phone
Of note, I can confirm that the main disk EFI is mounted at /Volumes/EFI. If I unmount the disk and then remount with Clover Configurator, I get the same error.
 

MacMan

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Joined
Dec 13, 2012
Messages
5
Motherboard
Gigabyte GA-Z77X-UD5H
CPU
intel i7-3770k
Graphics
NVIDIA GTX670
Mac
Classic Mac
Mobile Phone
It mounts fine using that tool. In fact, I can confirm that MB mounts the EFI as well - but it is reporting that it cannot do so.
 
Joined
Dec 13, 2012
Messages
5
Motherboard
Gigabyte GA-Z77X-UD5H
CPU
intel i7-3770k
Graphics
NVIDIA GTX670
Mac
Classic Mac
Mobile Phone
I was able to complete the install starting from scratch using the Unibeast Legacy Boot mode, the MB ran smoothly.

Thanks
 
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