+-o Root  <class IORegistryEntry, retain 12>
  +-o /  <class IOPlatformExpertDevice, registered, matched, active, busy 0, retain 33>
    +-o efi  <class IOService, !registered, !matched, active, busy 0, retain 7>
    | | {
    | |   "firmware-revision" = <84000000>
    | |   "device-properties" = <6c0200000100000001000000600200000d00000002010c00d041030a0000000001010600001c010106000000$
    | |   "name" = <"efi">
    | |   "firmware-abi" = <"EFI32">
    | |   "firmware-vendor" = <4300680061006d0065006c0065006f006e000000>
    | | }
    | |
    | +-o platform  <class IOService, !registered, !matched, active, busy 0, retain 4>
--
    +-o LNKE  <class IOACPIPlatformDevice, registered, matched, active, busy 0, retain 6>
    +-o LNKF  <class IOACPIPlatformDevice, registered, matched, active, busy 0, retain 6>
    +-o LNKG  <class IOACPIPlatformDevice, registered, matched, active, busy 0, retain 6>
    +-o LNKH  <class IOACPIPlatformDevice, registered, matched, active, busy 0, retain 6>
    +-o options  <class AppleEFINVRAM, registered, matched, active, busy 0, retain 6>
[