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Whichever method you use, look for the Cycle Count and the Condition as shown in the image at the top of this article. Or, for maximum geek points, paste this into Terminal.app, which will run the "system_profiler" tool at the command line, but limit it to just the information relevant to the battery status. You can also launch "System Information" (or "System Profiler") by going to the Apple Menu, look for "About This Mac" and then hold down the Option/Alt key and it will change (see image below).
Mac air battery not holding charge mac os x#
Previous versions of Mac OS X called it "System Profiler.app." Note: "System Information.app" is the name of the app in Lion and Mountain Lion. The easiest way to do that is to run the "System Information.app" found in /Applications/Utilities/. If recalibrating doesn't seem to help, you might need to check your battery's overall health. I use an external monitor at my office with the MacBook closed, and simply turn off the power to the external monitor if I'm not going to be using it for awhile.)ĭetermining the health of your MacBook's battery You might prefer to go to System Preferences » Energy Saver and set "Computer Sleep" to "Never".
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(Note: Caffeine will also keep your screensaver from running. Then, the next day, I will plug it in and let it charge through the workday, again running Caffeine to keep it awake. When I recalibrate, I prefer to make sure that my MacBook will not be interrupted at all either during the drain or the recharge period, so I will leave it on overnight while running Caffeine set to "Indefinitely" and let it really, fully discharge. If it doesn't, you might need to reset the System Management Controller (SMC), but in most case I've found that a simple recalibration will work. That should help the battery indicator recalibrate so that it shows the correct information.
Mac air battery not holding charge how to#
Apple explains how to do this, but basically it comes down to three steps:įully charge your MacBook (and leave it charged for about 2 hours)įully drain your MacBook (by using it on battery until it turns off) If your MacBook (any model) is not charging to 100%, it may need to be recalibrated.