Error mounting EFI on disk /dev/disk1

Winclone
1

Hello there.
Restore remains stuck at almost 90%.
Error log shows at the end “Error mounting EFI on disk /dev/disk1”.
I’ve tried everything: SIP is disabled, EFI partition is mountable, bootcamp partitioned as exFAT…what else did I miss!?

Such a waste of time!

Schermata 2021-12-27 alle 20.53.40
Schermata 2021-12-27 alle 20.53.401920×1008 137 KB

Last logs:

2021-12-27T19:33:21+01:00:Extracting file data: 148 GiB of 148 GiB (99%) done
2021-12-27T19:33:22+01:00:Last message repeated 33 times
2021-12-27T19:33:22+01:00:Extracting file data: 148 GiB of 148 GiB (100%) done
2021-12-27T19:33:22+01:00:Last message repeated 42 times
2021-12-27T19:33:22+01:00:Extracting file data, 90.000000% complete
2021-12-27T19:33:23+01:00:Done applying WIM image.
2021-12-27T19:33:25+01:00:Error mounting EFI on disk /dev/disk1

Terminal:

alessandro@iMac-27-2017 ~ % diskutil list

/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *121.3 GB disk0
1: EFI ⁨EFI⁩ 314.6 MB disk0s1
2: Apple_APFS ⁨⁩ 121.0 GB disk0s2

/dev/disk1 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk1
1: Apple_APFS ⁨Container disk2⁩ 340.0 GB disk1s1
2: Microsoft Basic Data ⁨OSXRESERVED⁩ 10.0 GB disk1s2
3: Microsoft Basic Data ⁨BOOTCAMP⁩ 650.2 GB disk1s3

/dev/disk2 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +340.0 GB disk2
Physical Store disk1s1
1: APFS Volume ⁨NewSSD - Dati⁩ 236.7 GB disk2s1
2: APFS Volume ⁨Preboot⁩ 269.2 MB disk2s2
3: APFS Volume ⁨Recovery⁩ 1.1 GB disk2s3
4: APFS Volume ⁨VM⁩ 1.1 MB disk2s4
5: APFS Volume ⁨NewSSD⁩ 15.8 GB disk2s5
6: APFS Snapshot ⁨com.apple.os.update-…⁩ 15.8 GB disk2s5s1

alessandro@iMac-27-2017 ~ % sudo diskutil mount disk0s1

Password:
Volume EFI on disk0s1 mounted

2

I see the issue. The disk1 doesn’t have an EFI partition. This partition should exist on all GPT disks. Did you format it with the Windows installer?

tim

1 Like
3

Schermata 2021-12-29 alle 11.46.41
Schermata 2021-12-29 alle 11.46.411920×838 184 KB

No, I didn’t!

Meanwhile:

  • I made disk0 “busy” (creating one NFTS partition on the whole disk) so that it couldn’t be taken;
  • I completely reinstalled macOS again on disk1;
  • I launched Bootcamp assistant, which created the NTFS partition con disk1;
  • I tried again to restore.

Result attached.

:frowning:

Last login: Wed Dec 29 11:07:06 on console
alessandro@iMac-27-2017 ~ % diskutil list

/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: Apple_APFS ⁨Container disk1⁩ 340.0 GB disk0s1
2: Microsoft Basic Data ⁨OSXRESERVED⁩ 10.0 GB disk0s2
3: Microsoft Basic Data ⁨BOOTCAMP⁩ 650.2 GB disk0s3

/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +340.0 GB disk1
Physical Store disk0s1
1: APFS Volume ⁨macOS - Dati⁩ 239.4 GB disk1s1
2: APFS Volume ⁨Preboot⁩ 269.1 MB disk1s2
3: APFS Volume ⁨Recovery⁩ 1.1 GB disk1s3
4: APFS Volume ⁨VM⁩ 1.1 GB disk1s4
5: APFS Volume ⁨macOS⁩ 15.8 GB disk1s5
6: APFS Snapshot ⁨com.apple.os.update-…⁩ 15.8 GB disk1s5s1

4

2021-12-29T11:39:39+01:00:Extracting file data: 148 GiB of 148 GiB (99%) done
2021-12-29T11:39:40+01:00:Last message repeated 34 times
2021-12-29T11:39:40+01:00:Extracting file data: 148 GiB of 148 GiB (100%) done
2021-12-29T11:39:40+01:00:Last message repeated 49 times
2021-12-29T11:39:40+01:00:Extracting file data, 90.000000% complete
2021-12-29T11:39:41+01:00:Done applying WIM image.
2021-12-29T11:39:43+01:00:Error mounting EFI on disk /dev/disk0

5

Before reinstalling macOS, partitioning has been made with GParted.

6

P.S.: Both disk0 and disk1 are internal and installed by Apple support as an upgrade.

7

I’m giving up…time up.

8

You have NO efi partition, what do you want to mount ?
Use Apple Disk Utility to partition disks, not 3rd party tools

/dev/disk3 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *240.1 GB disk3
1: EFI EFI 209.7 MB disk3s1
2: Microsoft Basic Data 1 239.8 GB disk3s2