3 ms·

I’m almost sure that the first actual energy saving (i.e. affecting the CPU) mode was introduced in 2021 with Monterey.

• anamexis 2y ago
  Intel Macbooks throttled the CPU with SpeedStep since at least i5, maybe earlier.
  • Toutouxc 2y ago
    Yes, but SpeedStep isn’t an optional power-saving mode that you can enable or disable, or that is enabled automatically on battery power.