Apple appears to be further optimizing macOS Sierra for battery performance after controversy over MacBook Pro battery life issues. macOS 10.12.3 beta 4 includes a new Display Brightness item under the Battery status indicator on the menu bar when checking which apps and features are using significant energy.
The new Display Brightness item only seems to appear when screen brightness is cranked up over about 80%, and clicking the new item automatically reduces the display brightness to under that threshold.
This new behavior works even when ‘Automatically adjust brightness’ is enabled, and you can manually increase the brightness after clicking the item that reduces it.
The idea here is that lowering the brightness is one of the more effective ways to lower power consumption and extend battery life, although sometimes higher brightness levels are necessary. The new feature could potentially be useful, however, if you need to extend a small amount of battery life before recharging.
Apple uses a similar method in iOS when reporting which apps and features consume more energy, although iOS also includes a Low Power Mode that macOS does not yet have.
This new entry appears in the same area where Apple removed the ‘time remaining’ indicator following complaints over inaccuracy. macOS 10.12.3 beta is currently only available to developers and public beta testers. The software update will be available to all macOS Sierra users in the future.
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