[Solved] Unable to mount EFI partition? High Sierra

[Arrichettu]

Hello to everyone,
I read a lots of treads but nothing helped me.
I'm not in SAFE MODE.
I have a problem with a new installation of High Sierra (APFS). I can boot only from my USB. I can mount only my InstallationUSB EFI and not my SSD EFI. I tried lots of things but nothing is working.
Clover Configurator can't mount EFI. EFI Mounter v3 can't mount EFI. Terminal can't mount EFI.
Disk util show all my drives

/dev/disk4 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *120.0 GB disk4

1: EFI 209.7 MB disk4s1

2: Apple_APFS Container disk5 119.8 GB disk4s2

I tried "disk util mount /dev/disk4s1"
says: Volume on disk4s1 failed to mount
If the volume is damaged, try the readonly option
I also tried to unmount but says is already unmounted.

It's strange that the USB stick shows up 2 time EFI and the SSD only 1.

Anyone can help me?

 

[RehabMan]

Hello to everyone,
I read a lots of treads but nothing helped me.
I'm not in SAFE MODE.
I have a problem with a new installation of High Sierra (APFS). I can boot only from my USB. I can mount only my InstallationUSB EFI and not my SSD EFI. I tried lots of things but nothing is working.
Clover Configurator can't mount EFI. EFI Mounter v3 can't mount EFI. Terminal can't mount EFI.
Disk util show all my drives

/dev/disk4 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *120.0 GB disk4

1: EFI 209.7 MB disk4s1

2: Apple_APFS Container disk5 119.8 GB disk4s2

I tried "disk util mount /dev/disk4s1"
says: Volume on disk4s1 failed to mount
If the volume is damaged, try the readonly option
I also tried to unmount but says is already unmounted.

It's strange that the USB stick shows up 2 time EFI and the SSD only 1.

Anyone can help me?

Terminal:

sudo diskutil mount disk4s1

 

[Arrichettu]

Volume Macintosh HD on disk4s1 mounted

And now... where is it? I don't see on desktop

 

[Arrichettu]

I'm sorry, it says

Volume on disk3s1 failed to mount
If the volume is damaged, try the "readOnly" option

After reboot it changed the number of the disk so with disk4s1 I mounted volume "VM"

 

[Arrichettu]

EDIT: Solved by re-installing High Sierra.
I downloaded HighSierra from the AppleStore (10.13.6 - 17G65) and i created the Install-USB using the terminal and my USB-efi folder (for some reasons i was able to mount only my usb efi).
I had a problem with boot high sierra in normal mode. It booted only in safe mode. In verbose mode i noticed the following message:
[IGPU] Begin Gfx firmware load process
ForceWake Multithread = 0x30002
etc....
Doing retry # (from 1 to 50)
I simply put lilu.kext and intelgraphicsfixup.kext in L/E and adding "-disablegfxfirmware" as flag in the bootloader.

Maybe i can help someone because i didn't find anything about that

 

[chotaa]

EDIT: Solved by re-installing High Sierra.
I downloaded HighSierra from the AppleStore (10.13.6 - 17G65) and i created the Install-USB using the terminal and my USB-efi folder (for some reasons i was able to mount only my usb efi).
I had a problem with boot high sierra in normal mode. It booted only in safe mode. In verbose mode i noticed the following message:
[IGPU] Begin Gfx firmware load process
ForceWake Multithread = 0x30002
etc....
Doing retry # (from 1 to 50)
I simply put lilu.kext and intelgraphicsfixup.kext in L/E and adding "-disablegfxfirmware" as flag in the bootloader.

Maybe i can help someone because i didn't find anything about that

Hey Arri, so are you saying that with lilu.kext and the other changes, this might be solved without re-install?

 

[vcorder07]

The post-installation of Multibeast solved this issue for me. Thank you