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Question: macOS Mojave battery drain

Just updated my OS to Mojave this morning and brought my laptop to work. It was on full charge when I left home. 2hrs after using it, the battery percentage was down to 40% which never happened before during any of my regular use. Also, the texts on the screen are blurry.

MACBOOK AIR (13-INCH, 2017), macOS Mojave (10.14)

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Sep 25, 2018 6:41 PM in response to hvbris In response to hvbris

I'm having the same issue here! Battery will drain while the computer sleeps. It drains about 5% for every hour. Also the battery meter (menu bar) is wild. Started at 41% when I read this post, was at 33% when I started typing this reply, now is at 36%. I have a Macbook 12" Retina Early-2016, did a software update from High Sierra. Please someone help! PS: I already did some coding via Terminal to kill the Wi-Fi signal used for Find My Mac, but it didn't help.

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Sep 26, 2018 11:17 AM in response to hvbris In response to hvbris

My laptop's battery life has reduced from 8 hours to 3 hours after upgrading to Mojave. Apple needs to work on this issue as there is is also lot of lagging in my MacBook for the first time.

Apple should create a patch or someone please tell me how to downgrade back to High Sierra.

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Sep 27, 2018 8:39 AM in response to hvbris In response to hvbris

I have same problem too. I am using early 2015 13" Retina MBP. Just installed Mojave yesterday, but I found that battery drained 10% in 30mins under new OS. That never happened the day before when I was still using Sierra (When I was using Sierra, a fully charged battery can be ran a whole day over 10hrs, but now I believe 6hrs will be the max for my MBP). Checked from system information, battery is healthy in normal condition, Cycle Count only 490.

What happened to the new OS? Any offical reply from Apple? Any solution to resume normal or can I switch back to Sierra?

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Sep 27, 2018 12:25 AM in response to hvbris In response to hvbris

I am from India, updated my MacBook Air yesterday which is 1 week old, Mojave was draining battery like smartphone from 2015, the battery died in 4 hours against 10 hours on High Sierra with similar usage. Used time machine and back to High Sierra, now its back to normal.

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Sep 29, 2018 6:01 AM in response to hvbris In response to hvbris

I spoke to Apple support, suggested resetting the battery/memory by holding down the control, shift, option and power keys then release the first three at the same time. Also noted this update will take time to configure the file structure. It does this while sleeping and takes a incredible amount of resource. It took three days but my Mac has returned to normal all on its own or maybe the reset helped. Give it a try, sometimes waiting does pay off.

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Sep 29, 2018 6:26 AM in response to jefftown32 In response to jefftown32

Spoke to Apple, I was skeptical when told it may take 24 to 48 hours for the OS to reorganize the file structure. Also suggested resetting the battery/memory by powering your Mac off then hold the left shift, control, option and power buttons down, then release the first three at the same time. I did that, not sure it contributed to the solution but on day three of the upgrade my Mac has rerturned to normal all on its own.

Give it a few days, things should be just fine. I’m fact this morning I opened to a 100% battery life after a 10hr sleep mode.

Cheers

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Question marked as Helpful

Sep 25, 2018 6:41 PM in response to hvbris In response to hvbris

I'm having the same issue here! Battery will drain while the computer sleeps. It drains about 5% for every hour. Also the battery meter (menu bar) is wild. Started at 41% when I read this post, was at 33% when I started typing this reply, now is at 36%. I have a Macbook 12" Retina Early-2016, did a software update from High Sierra. Please someone help! PS: I already did some coding via Terminal to kill the Wi-Fi signal used for Find My Mac, but it didn't help.

Sep 25, 2018 6:41 PM

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Sep 26, 2018 11:17 AM in response to hvbris In response to hvbris

My laptop's battery life has reduced from 8 hours to 3 hours after upgrading to Mojave. Apple needs to work on this issue as there is is also lot of lagging in my MacBook for the first time.

Apple should create a patch or someone please tell me how to downgrade back to High Sierra.

Sep 26, 2018 11:17 AM

Reply Helpful (48)
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Sep 27, 2018 12:25 AM in response to hvbris In response to hvbris

I am from India, updated my MacBook Air yesterday which is 1 week old, Mojave was draining battery like smartphone from 2015, the battery died in 4 hours against 10 hours on High Sierra with similar usage. Used time machine and back to High Sierra, now its back to normal.

Sep 27, 2018 12:25 AM

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Sep 27, 2018 5:22 AM in response to hvbris In response to hvbris

I have a Mac air few months old. Just upgraded to Mojave and have the same issue. I close my laptop at 100% open it up the next day and its down to 70% without even using it. This is awful, its useless with a 2hr battery life.

Sep 27, 2018 5:22 AM

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Sep 27, 2018 8:39 AM in response to hvbris In response to hvbris

I have same problem too. I am using early 2015 13" Retina MBP. Just installed Mojave yesterday, but I found that battery drained 10% in 30mins under new OS. That never happened the day before when I was still using Sierra (When I was using Sierra, a fully charged battery can be ran a whole day over 10hrs, but now I believe 6hrs will be the max for my MBP). Checked from system information, battery is healthy in normal condition, Cycle Count only 490.

What happened to the new OS? Any offical reply from Apple? Any solution to resume normal or can I switch back to Sierra?

Sep 27, 2018 8:39 AM

Reply Helpful (45)
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Question: macOS Mojave battery drain