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VirtualSMC

Advanced Apple SMC emulator in the kernel. Requires Lilu for full functioning.

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Supports macOS 10.4 and newer (10.9 and newer is recommended)
Implements MMIO protocol and interrupt-based responses for compatibility with modern OS
Properly reports key attributes and r/w protection in the keys
Allows tuning on per-model basis and allows to use different SMC generations
Extensible by the plugins for sensor and key addition support
Enables smcdebug=XX boot argument support on 10.9
Replaces hardware SMC it finds (to disable SMC entirely you need to flash a dedicated firmware)

Add -vsmcdbg to enable debug printing (available in DEBUG binaries).
Add -vsmcoff to switch off all the Lilu enhancements.
Add -vsmcbeta to enable Lilu enhancements on unsupported OS (14 and below are enabled by default).
Add -vsmcrpt to report about missing SMC keys to the system log.
Add -vsmccomp to prefer existing hardware SMC implementation if found.
Add vsmcgen=X to force exposing X-gen SMC device (1 and 2 are supported).
Add vsmchbkp=X to set HBKP dumping mode (0 - off, 1 - normal, 2 - without encryption).
Add vsmcslvl=X to set value serialisation level (0 - off, 1 - normal, 2 - with sensitive data (default)).
Add smcdebug=0xff to enable AppleSMC debug information printing.
Add watchdog=0 to disable WatchDog timer (if you get accidental reboots).

Apple for macOS
netkas for the original idea of creating a software SMC emulator
CupertinoNet for reversing most of MMIO protocol and SMC headers
Alex Ionescu for the initial reverse of SMC firmware
07151129 for co-devoloping VirtualSMC and invaluable help during the research
lvs1974 for developing laptop sensor support
usr-sse2 for developing laptop sensor support
joedmru for developing Super I/O chips support
theopolis for smc-fuzzer tool
kokke for tiny-AES-c
vit9696 for Lilu.kext and this software
Additional big thanks go to all the contributors and researchers involved in Apple SMC exploration!