macOS Mojave battery drain

Ok, so i solved this problem on my MacBook Pro 13'' (Early 2015). It turned out that battery drain was caused by fully loaded CPU (almost 100%). So, you can check this out, just open Activity Monitor (Finder - Apps - Utilities) and then look up for CPU tab. And then just watch which apps and processes uses your CPU. You can also check out other tabs and overall system and CPU load.

So it turned out that my CPU was used by the process called "qemu system x86_64 mac" and this was the reason my MacBook Pro had zero battery after about 3 hours after full charge. If you have the same process, just google the name of it and then you'll find the link to the thread on Apple Community on how to delete it (it's not that simple tho).

It really worked for me so my macbook works fine right now.

Same issue for me : after upgrading to Mojave, autonomy decreased from about 10 hours to 3 !

I tried to reset nvram, smc, ... but it didn't help

Fix : I saw in activity monitor "Activrelay_ka" using a lot of processor. Uninstalling Promethean Activdriver increased autonomy from 3 to more than 9 hours. This driver for interactive board didn't drain battery before Mojave...

Hope it will help some of you.

My 2015 MB Pro has also had battery drain issues after updating to Mojave and around the same time I had also upgraded from Citrix Receiver to Citrix Workspace. In addition to more rapid battery drain while in sleep mode, I had frequent problems with sluggishness while logged in to my work apps using Workspace (pinwheel was constantly spinning). This had gone on for the past few months and 2 days ago I uninstalled Workspace and reinstalled Receiver and to my surprise, not only do my work apps now work again, but my battery did not drain overnight as it has been doing for the past couple of months (was still at 99% after sitting all night unplugged). It may be too early to tell, but maybe a big part of the Mojave battery issue had to do with Citrix Workspace.

Guys, i have posted this before also and i am doing it again. I have Macbook pro 13" 2015 version and after updating to Mojave battery started draining like crazy. doing some online search i found a solution which says change the hibernation setting to 25, normally it would be 2 or 3. by changing the setting to 25 all the ram and background functions will be disabled and device will not lose power in hibernation/sleep mode. I have found it working good for me. i have checked my mac by charging it to 99% and than leaving it for 2 days, after 2 days it was still at 98%. however during working mac still loses power like crazy and this i believe need to be addressed by apple in next update.

Just share my observation on the battery drain issue.

Yesterday have packed my MacBook air fully charged into my bag, hardly used it during that day and now take it out with completely empty battery (<1%). The battery is brand new with 7 cycles only. So I have fired up terminal and checked with "pmset -g assertions", what could prevent sleep. I have noticed, that apparently nfsd has gained during Mojave upgrade the ability to prevent sleep. In the past I have used nfsd, so on my air is an /etc/exports file. After renaming this file by "sudo mv /etc/exports /etc/exports.off" and force-exit nfsd by "sudo killall nfsd", that nfsd was not running anymore.

Will monitor the situation and if problem is not fixed, will come back to this forum.

BTW: In case this does not fix it for some guys, then try out "pmset -g assertions" and check, what else can prevent sleep. On my air I have another candidate, which could be the root cause: The USB memory stick continuously plugged in (due to small internal disk). pmset reveals a kernel assertion from that USB. Before upgrade this was not a problem. Hope it is still not.

Actually now i am even more confused... For me the solution was returning to High Sierra, as for most people in this thread if i am not mistaken. it is a ridiculous solution but it is the only one since mojave still drains the battery in half the time..(as far as i can understand 10.14.4 is the only version we do not have enough feedback yet) So this means that there was no permanent damage to the battery. Have you tried going back to HS and see how it goes?

Same thing here. 2015 MBP working perfectly on OSX Sierra. I updated to a clean install of Mojave and was losing 20% battery during sleep immediately. Contacted Support and they recommended it was a hardware failure and tried to send me to the Genius bar since my battery is at 522 cycles.

2 days ago I downgraded back to Sierra with a clean install. Last night, closed the lid and lost 0% battery overnight. Problem solved. Hopefully Apple starts looking at their Mojave code and resolving this issue.

that is what im saying !! I got a new computer and I still had the same problem thus you have to downgrade OS to older version here is a copy of sierra https://support.apple.com/en-us/HT208202

remember to back up your files on time machine whenever you do a system upgrade/downgrade just as a precaution it is always better to have your work saved

@pixelalb

not necessarily. If you turn the music off do you stop hearing sound? (wifi being disabled may not stop things still running/waiting for connection)

Is your content cache turned on? In System Preferences -> Sharing. If so, help us work this out and test disabling it

It can't just be devices with the T2 chip; my 2015 13" Retina MacBook is having this issue. The issue is Mojave, nothing else -- this issue never happened in High Sierra.

I work for a school district that just recently updated all their MacBook Airs to Mojave, and we are experiencing this issue on a mass level. Apple needs to figure this out. Again, we shouldn't have to mess with terminal flags/parameters to fix a messy OS. Battery should be functioning properly out of the box, and it isn't. Buying a new MacBook won't fix this issue either, as again, it's an OS issue.

Hey Guys, I am owning a Macbook air and the battery drained up fast after updating the latest OS Mojave. What i did was upgrade to the ultimate latest os version 10.14.2 and the battery draining issue was a little much more better. At least now my batter won't drain up during sleeping mode. But compare to the last time, the battery draining issue is not entirely fixed thou.

i have tried all mojave versions up to .3 on my MacBook Air 2015. it is the same. I have no problem with sleep drain but when i use it battery life is significantly reduced. I have switched back to High Sierra of course since it is the only way to enjoy the biggest reason to own a MacBook Air, charging it once per week!

So does anyone gave 10.14.4 a go ?

Meanwhile I got a new battery, glad I bought AppleCare for my MacBook Pro 2017. I’m sure, the continuous draining broke my battery. Now with the new battery the draining issue is still present, the only workaround which helps is to set the hibernatemode from 3 to 25.

Disabling content caching fixed it for me. Standby barely touches the batt.

Who else has tried that?

can't you create a bootable USB with "install macOS High Sierra" file, boot from the flash drive and install HS? Don't tell me they don't permit HS installation on the latest macs???!!