Since not everyone will have Alfred installed :), I created an AppleScript which should run everywhere. The list command will give a myriad of power manager entries, and the вЂњBCLMвЂќ entry (presumably short for Battery Charge Level Maximum) refers to the eponymous value. When you run it in the terminal with the -h option, it will tell you of three commands: list, read, & write. From this I extracted the utility вЂњsmcutilвЂќ, which goes back ages and does some low-level fiddling with the Power Manager on MacBooks. Researching this topic, I found this nice blog entry which refers to two utilities (which I have not tried), and has an Alfred Workflow which worked for me. (In battery-operated cars there frequently is an option to stop battery charging at 80%.) When youвЂ™re planning to travel, of course you want 100%, but when you are working home or wherever and have it plugged in, the battery suffers a little always when always being 100%. One strategy to prolong battery life (at least the Lithium ion variant) is to not keep it fully charged to 100% at all times. Long readД«attery charging is a rather involved subject, recently I here referred to one good source on it. After computer restart, the charge level maximum is frequently reset to 100%. If you are up to it, save the script as app. Run it (вЊR) and follow the dialog options.ДЄll the above hassle is only needed for the first time. You will now see the script in the Script Editor. rightclick setBatterењњhargeLevelMax.scripd, select open.

You have now cleared the вЂњquarantineвЂќ bit.

It will open in the terminal, ignore this and quit the terminal.

unzip (by double clicking), notice two folder contents.

Update: superseded by вЂњ AlDente (Pro)вЂќ TL DR (improved version) Prolong your battery life! This post applies to MacBooks (Air, pro, вЂ¦) only

Aldente pro