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Multibeast fails on mounting EFI partition (High Sierra 10.3.4)

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Joined
Aug 20, 2012
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5
Motherboard
GA-Z77X-D3H
CPU
i5-3750k
Graphics
Nvdia Geforce GTX 970
Mac
  1. Mac Pro
Classic Mac
  1. PowerBook
Mobile Phone
  1. Android
  2. Windows Phone
When trying to install Nvidia Graphics Fixup Multibeast fails to mount the EFI partition, mounting it manually on /Volumes/EFI works just fine. If the partition is already mounted Multibeast unmounts it and then fails with the same error.

-------------------------------------------------------
  • macOS version: 10.3.4 (build 17E202)
  • MultiBeast version: 10.2.0
  • MultiBeast choices:
Drivers > Graphics > Nvidia Graphics Fixup
  • Destination files system type, HFS+ or APFS
Root partition is APFS and EFI partition fat
  • MultiBeast.log contents
04/25/18 21:12:43 - Mounting EFI
04/25/18 21:12:43 - Mount of EFI partition failed. Exiting.
  • install.log contents for the choices that you are installing
No multibeast related entries in /var/log/install.log
 
In Terminal post the output from the following command:

Code:
diskutil list

Then post the volume name you were installing to and if it has Clover installed on it.
 
Install disk 500GB (multiboot with windows and linux):

EFI partition is /dev/disk0s1
APFS root partition is /dev/disk0s9

Code:
/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *500.1 GB   disk0

   1:                        EFI                         210.8 MB   disk0s1

   2:       Microsoft Basic Data Recovery                208.7 MB   disk0s2

   3:         Microsoft Reserved                         134.2 MB   disk0s3

   4:       Microsoft Basic Data                         188.3 GB   disk0s4

   5:           Windows Recovery                         872.4 MB   disk0s5

   6:           Linux Filesystem                         120.4 GB   disk0s6

   7:                 Linux Swap                         500.2 MB   disk0s7

   8:                  Apple_HFS                         84.5 GB    disk0s8

   9:                 Apple_APFS Container disk3         104.9 GB   disk0s9

APFS container:
disk3s1 being the target for multibeast.

Code:
/dev/disk3 (synthesized):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      APFS Container Scheme -                      +104.9 GB   disk3

                                Physical Store disk0s9

   1:                APFS Volume MacOSX                  90.4 GB    disk3s1

   2:                APFS Volume Preboot                 21.5 MB    disk3s2

   3:                APFS Volume Recovery                517.8 MB   disk3s3

   4:                APFS Volume VM                      1.1 GB     disk3s4
 
The issue started (for me) with multibeast 10.x on high sierra, prior versions of multibeast on older OSX versions had no issues mounting this EFI partition.
 
I get the same error, the EFI partition was created on Linux:

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *240.1 GB disk0

1: Linux Filesystem 64.2 GB disk0s1

2: Apple_APFS Container disk1 175.7 GB disk0s2

3: EFI ESP 209.7 MB disk0s3



If I mount the EFI partition with another tool, I can skip the error. EFI Mounter v3 gives an error too but it mounts.
 
I had same issue. Problem seem to be with Clover that MultiBeast installs. I overwrote EFI installed by MultiBeast with one on USB that was installed by UniBeast and that fixed problem.
 
I had same issue. Problem seem to be with Clover that MultiBeast installs. I overwrote EFI installed by MultiBeast with one on USB that was installed by UniBeast and that fixed problem.

@Arty Hi there, I am having the same issue, can you kindly elaborate on how exactly you did it. Thanks
 
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