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by Toutouxc 734 days ago
I’m almost sure that the first actual energy saving (i.e. affecting the CPU) mode was introduced in 2021 with Monterey.
1 comments

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