➜  EFI sudo bless --getBoot --verbose
EFI found at IODeviceTree:/efi
Current EFI boot device string is: '<array><dict><key>MemoryType</key><integer size="64">0xb</integer><key>StartingAddress</key><integer size="64">0xffd50000</integer><key>IOEFIDevicePathType</key><string>HardwareMemoryMapped</string><key>EndingAddress</key><integer size="64">0xfffdffff</integer></dict><dict><key>IOEFIDevicePathType</key><string>MediaFirmwareVolumeFilePath</string><key>Guid</key><string>2B0585EB-D8B8-49A9-8B8C-E21B01AEF2B7</string></dict><dict><key>IOEFIBootOption</key><string>HD</string></dict></array>'
Boot option is 8BE4DF61-93CA-11D2-AA0D-00E098032B8C:Boot0080
Processing boot option 'Mac OS X'
Boot option matches XML representation
Could not find disk device for string
Could not find network interface.
Firmware feature mask: 0xFF1FFF3F
Firmware features: 0xC00C5417
Legacy mode suppported
Boot option is a legacy device
Searching for legacy type 'HD'
filesystem[0] '/dev/disk2s5' => '/'
Firmware feature mask: 0xFF1FFF3F
Firmware features: 0xC00C5417
Legacy mode suppported
Got IODeviceTree:/rom
Got start address ffd50000
Got size 290000
Found PCI-Express interconnect in protocol characteristics
AppleAPFSContainer
 AppleAPFSMedia
  AppleAPFSContainerScheme
   Untitled 2
    IOGUIDPartitionScheme
     Samsung SSD 970 PRO 1TB Media
      IOBlockStorageDriver
       IONVMeBlockStorageDevice
        IONVMeController
         pci144d,a808
          IOPP
           pci-bridge
            IOPP
             PXS1
              IOPP
               IOU0
                AppleACPIPCI
                 PCI0
                  AppleACPIPlatformExpert
                   MacPro5,1
                    Root
filesystem[2] '/dev/disk2s1' => '/System/Volumes/Data'
Firmware feature mask: 0xFF1FFF3F
Firmware features: 0xC00C5417
Legacy mode suppported
Got IODeviceTree:/rom
Got start address ffd50000
Got size 290000
Found PCI-Express interconnect in protocol characteristics
AppleAPFSContainer
 AppleAPFSMedia
  AppleAPFSContainerScheme
   Untitled 2
    IOGUIDPartitionScheme
     Samsung SSD 970 PRO 1TB Media
      IOBlockStorageDriver
       IONVMeBlockStorageDevice
        IONVMeController
         pci144d,a808
          IOPP
           pci-bridge
            IOPP
             PXS1
              IOPP
               IOU0
                AppleACPIPCI
                 PCI0
                  AppleACPIPlatformExpert
                   MacPro5,1
                    Root
filesystem[3] '/dev/disk2s4' => '/private/var/vm'
Firmware feature mask: 0xFF1FFF3F
Firmware features: 0xC00C5417
Legacy mode suppported
Got IODeviceTree:/rom
Got start address ffd50000
Got size 290000
Found PCI-Express interconnect in protocol characteristics
AppleAPFSContainer
 AppleAPFSMedia
  AppleAPFSContainerScheme
   Untitled 2
    IOGUIDPartitionScheme
     Samsung SSD 970 PRO 1TB Media
      IOBlockStorageDriver
       IONVMeBlockStorageDevice
        IONVMeController
         pci144d,a808
          IOPP
           pci-bridge
            IOPP
             PXS1
              IOPP
               IOU0
                AppleACPIPCI
                 PCI0
                  AppleACPIPlatformExpert
                   MacPro5,1
                    Root
filesystem[5] '/dev/disk0s4' => '/Volumes/WIN10'
Firmware feature mask: 0xFF1FFF3F
Firmware features: 0xC00C5417
Legacy mode suppported
Got IODeviceTree:/rom
Got start address ffd50000
Got size 290000
Found PCI-Express interconnect in protocol characteristics
IOGUIDPartitionScheme
 Samsung SSD 970 EVO Plus 2TB Media
  IOBlockStorageDriver
   IONVMeBlockStorageDevice
    IONVMeController
     pci144d,a808
      IOPP
       pci-bridge
        IOPP
         PXS1
          IOPP
           IOU0
            AppleACPIPCI
             PCI0
              AppleACPIPlatformExpert
               MacPro5,1
                Root
Matching legacy device 'disk0s4'
Legacy boot device detected
/dev/disk0s4

➜  EFI nvram -p
efi-boot-device	<array><dict><key>MemoryType</key><integer size="64">0xb</integer><key>StartingAddress</key><integer size="64">0xffd50000</integer><key>IOEFIDevicePathType</key><string>HardwareMemoryMapped</string><key>EndingAddress</key><integer size="64">0xfffdffff</integer></dict><dict><key>IOEFIDevicePathType</key><string>MediaFirmwareVolumeFilePath</string><key>Guid</key><string>2B0585EB-D8B8-49A9-8B8C-E21B01AEF2B7</string></dict><dict><key>IOEFIBootOption</key><string>HD</string></dict></array>
boot-args	-no_compat_check cwae=2 shikigva=160 shiki-id=Mac-7BA5B2D9E42DDD94
BootCampHD	%02%01%0c%00%d0A%03%0a%00%00%00%00%01%01%06%00%00%03%01%01%06%00%00%00%01%01%06%00%00%11%01%01%06%00%00%00%03%16%10%00%01%00%00%00%00%258W%91P%0e3%7f%ff%04%00
SMTDisable	%01
prev-lang:kbd	en:252
SystemAudioVolumeDB	%fa
fmm-computer-name	XXXXXXXXXXX
csr-active-config	w%00%00%00
SystemAudioVolume	:
EFIBluetoothDelay	%b8%0b
efi-boot-device-data	%01%03%18%00%0b%00%00%00%00%00%d5%ff%00%00%00%00%ff%ff%fd%ff%00%00%00%00%04%06%14%00%eb%85%05+%b8%d8%a9I%8b%8c%e2%1b%01%ae%f2%b7%7f%ff%04%00