The procedures involved in resetting the SMC vary and mostly depend on the type of processor your Mac uses. The SMC also controls how your Mac manages power, battery, and other related functionalities. Press and hold these keys as soon as the Apple logo comes up on the screen: Command + Option + P + R. To perform an NVRAM reset, shut down your Mac and turn it back on. Resetting your Mac’s System Management Controller (SMC) and NVRAM (Non-Volatile Random-access memory) can help put a stop to macOS Big Sur battery drainage issues.
Wait for a couple of minutes and charge your Mac till the battery gets a full charge (i.e.
To recalibrate your battery, use your Mac till the battery discharges completely and shut down. A system update can mess with your Mac’s calibration routine and cause the battery to drain faster than it’s supposed to. MacBooks undergo a calibration process that helps to estimate how long your battery would last on its current charge level. Try some of the methods below to fix the problem. If the battery drainage persists beyond this period, there’s probably a problem with your Mac’s battery calibration. The issue should resolve itself in about 2-5 days and battery usage should return to normal. These processes consume a lot of power but they only last a couple of days. That’s because several processes run in the background to acclimate your Mac to the new operating system. We also found a couple of users experiencing random battery discharge when their Mac is powered off or in sleep mode.īefore we list some solutions to these problems, you should note that sometimes, battery drainage is normal after a software update. Several Mac users reported significant battery drainage after upgrading to macOS Big Sur.
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