Script to play a warning when battery level is under a threshold in MacOS
问题 I am using a MacBook and the battery is unreliable. I am trying to find a script command that will enable the laptop to play a beep when the battery level is lower than a threshold. After some search and tests, I found a quick solution below: 1) I first create a file called check_battery with the following contents: ioreg -l | awk '$3~/Capacity/{c[$3]=$5}END{OFMT="%.3f";max=c["\"MaxCapacity\""]; bat= (max>0?100*c["\"CurrentCapacity\""]/max:"?"); printf("%d", bat)}' 2) I then created the