Apple SMC Version Information (Type 134)

Source: the AppleSmBios.h header of OpenCore, Include/Apple/IndustryStandard.

Tells the version of the firmware of the System Management Controller (SMC). Newer Macs carry no such structure.

Table 1. Apple SMC Version Information structure
Offset	Version	Name	Length	Value	Description
`0x00`	2.0+	Type	`BYTE`	`134`	Apple SMC Version Information indicator
`0x01`	2.0+	Length	`BYTE`	Varies	Length of the structure
`0x02`	2.0+	Handle	`WORD`	Varies
`0x04`	2.0+	SMC Version	16 `BYTE`	Varies	Version of the SMC firmware, e.g. `2.15f7` as text followed by bytes of zero