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You can install this command line tool from github.com/jmstacey/screenbrightness. The install is pretty easy if you have homebrew: brew install screenbrightness And usage is straightforward: Set 100% brightness: screenbrightness 1 Set 50% brightness: screenbrightness 0.5 Unfortunately it doesn't work for external monitors. See Does Apple support ...


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GeekTool itself uses minimal CPU as shown by the other answers. However, GeekTool really just facilitates running other scripts. It's the frequency and impact of those scripts on your system you want to worry about. By tuning them in their runtime and CPU load you can have GeekTool present useful information with minimal system impact. I would focus less ...


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Geektool is well suited for displaying static content with occasional refreshes - and you should stick to this usage model on a portable. A couple of 1 second refresh geeklets can noticeably reduce your battery time. For example, I have rather complex Geektool setup (23 geeklets), but "GeekTool Helper" using 0.0 CPU in average. The secret is to set refresh ...



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