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How To Fix: MacOS Mojave Update Draining Your Mac Battery

Finally, MacOS Mojave is here and several users can’t wait to update their Macs and see what’s new. However, when it comes to Mac users who have already got the latest on what Mac has to offer, they have reported that their computer’s battery life is draining faster than ever. If your battery is fine before the update, you are not alone.

Here’s How You Can Fix a Draining Battery in Mac Due to the New Update

A significant number of Mac users have reported that their MacBook Air, MacBook Pro, and MacBook have lesser screen times and battery lives after the Mojave came in into their system. The installation might be the cause of this problem. There are some things that you can do to fix this issue.

1. Save Power by Going into your Mac’s Settings. You can do this through the following

  • Go to the System Preference. Select the option “Energy Saver”. After selecting “Energy Saver”, you can activate the “Display Dim while on Battery” and the “Hard Disk Put into Sleep Mode Whenever Possible.: You can also have the option to change the times of your display sleep and computer sleep in order to prolong battery life.
  • If you don’t frequently use your Bluetooth option, you can turn it off. In order to do this, you can simply go to your Mac’s “System Preferences”. Select the option “Bluetooth” or click on the Blue “B” icon. Make sure to turn it off.
  • If you are not into Wi-Fi, you have the option to turn it off. Most Mac still turns on Wi-Fi services and drain the battery while searching for networks. In order to disconnect your Wi-Fi, you can go to your Status Menu and click the Wi-Fi option. You can then select the “Turn Wi-Fi” option to save some battery.
  • Make sure that you optimize your display settings as much as possible. In order to do this, you can simply go to your Mac’s “System Preferences” then select “Display”. You can click the box that shows the option to “Automatically Adjust Brightness”. You can also reduce the “Brightness” of your screen as long as your eyes are comfortable looking at your computer.
  • You can see the applications that use a lot of energy on your computer. In order to do this, you can simply go to the “Applications” option. Select “Utilities”, then go to your “Activity Monitor” screen. From the CPU, Memory, Energy, Disk and Network options, select the Energy one. You can see which app is using the most of your battery power and you can turn it off if you prefer.

2. Stop Dynamic Backgrounds. There’s a new feature that the Mojave update offers. This feature lets your desktop display some photos and background pictures on your computer on an entire day. You can maximize your battery if you don’t do any dynamic backgrounds. In order to stop this feature, you can do the following steps:

  • Go to your Mac’s “System Preferences”
  • Go to the “Desktop and Screen Saver” option
  • You can select the options that are available other than “Dynamic”. You can go for “Light – Still” or “Dark – Still”
  • 3. Battery Drain Even in Hibernate or Sleep Mode. If your battery is still draining even if you already put your Mac to sleep, you might want to change the settings on your computer. In order to fix this issue, you can simply go to your hibernate settings. You can choose from three different hibernate types namely:
  • Hibernatemode 0: This mode is the normal hibernation mode of all Mac computers
  • Hibernatemode 3: This is the normal hibernation mode of all portable Mac computers. This means that your system is overwriting the contents of your RAM to make sure that your computer wakes up faster. This also means that your Mac is in safe sleep mode.
  • Hibernatemode 25: This is the recommended hibernation mode since it maximizes your battery life. However, note that this kind of hibernation will have a slower wake up time compared to other modes. If you want to turn this on, you can do this through the following:
    • Go to your Mac’s terminal app. Make sure that you are in Admin mode. Enter the following command:
    • Sudo pmset – a hibernate mode 25 auto power off 0 standby 0

4. Reset everything on your System Management Controller – System Management Controller is the one that manages your battery settings. You have the option to reset this in order to fix your problem. The process varies according to the Mac Model but this is how it generally works:

  • This applies to removable Mac batteries:
    • Turn off your Mac computer
    • Remove the battery
    • Go to the power button and press it for 5 seconds
    • Put the battery back again
    • Turn on your Mac
  • If your Mac is a 2009 model or later, you might have a non-removable battery. Here’s how to reset your system management controller
    • Turn off your Mac computer
    • Press the P, R, Command and Option Keys while turning on your Mac
    • After 20 seconds, release the keys


These are just some of the ways that you can do to prevent the drain of your battery life. If you are still experiencing the problem, it is advisable to go to the nearest Mac or Apple store to get it fixed. You might also want to submit a feedback to Apple through their website to make them aware that there’s something going on in the Mojave MacOS update.

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