macOS Mojave battery drain

Same here... reset both.

I was on Sierra before and my Air would last a few days with light use. Now I'll only get a few hours and have to charge it each day.

Very frustrating as Apple should finish testing everything before releases

For some people here resetting PRAM and SVC helps, but for me it did not, I am seriously considering my future when it comes to apple products, its unforgivable stab in the back. Huge productivity hit from a company that heralded productivity.

If resetting the PRAM and SMC does not fix things, it is probably a software issue, probably some older software that does not play nice with Mojave.

In that case, backing up and doing a clean install *should* help (it apparently has for some people, but not all, as there seem to be different causes for this; some mac models appear to be affected more than others). When something affects everyone, it is a bug; when affects a significant minority, like in this case (yes, most people do NOT see the problem), it is harder to pinpoint the cause.

I had this problem too but I tried two things and now it is fine.

1. I turned off Address Book Sync to iCloud.
2. I turned off bluetooth and removed my magic mouse from devices.

And now no more issues with battery drain. I put it to sleep in the morning with 100% and when I opened it after 3 hours there was still 100%.

Hope it can help someone.

slce said:

I read it is because of the dark mode feature. The LCD works more on dark mode... not really sure but are you using the dark mode feature? IF you did, does switching to light mode fixes the issue? I am just curious.

Absolutely not true. The light for the LCD comes from a light panel that illuminates the entire screen, all the time. While you can vary the brightness of the backlight, dark pixels versus light pixels have absolutely no effect on power usage. Dark pixels merely don't let as much light THROUGH the display to your eyes.

This light panel is also why the Apple logo is illuminated on certain Apple laptops.

Note that this is not true of OLED displays such as the iPhone X or the Apple Watch.

Apple DOES NOT monitor these forums.

Apple hasn't said *anything* about any bugs in Mojave that they haven't already fixed. This is standard procedure for Apple unless it's a really bad thing that they issue a press release about.

The only way to get Apple's support on anything is to file a Radar (Apple's in-house bug tracking system) and I haven't done that in years so I don't know how one would do it when you're not a developer. In any case, what usually happens is that if it doesn't get marked as a duplicate you can assume it will be ignored because nobody else has complained, or if it IS marked as a duplicate they obviously know about it so you have a slightly-better chance of getting it fixed.

Generally, a problem like this is some driver somewhere that's leaving something turned on when they shouldn't (which will eventually be found and stomped) or some new behavior (like indexing a filesystem, or your pictures, or something like that, which happens when you reinstall the OS) which is expected behavior and will just suck power for a while until the job is done.

In any case, my guess is that it will get better over the next few releases as they find bugs and stomp them.

THIS IS WHY YOU NEVER INSTALL THE NEW OS UNTIL IT HAS BEEN AROUND A WHILE. Let someone ELSE do the testing for Apple.

I can't begin to imagine how @Michal_Banas figured to do this or what the effect is but can confirm this has fixed the battery drain issue for now.

Resetting the PRAM and SMC didn't change a thing but turning off the bluetooth - removing the magic mouse from my devices and also turning off the address book sync has returned things to normal.

I put my MacBook to sleep before going to bed and in the morning it had just used 1%. So far at work I'm using 20% every hour whereas previously i burned 100% in less than 3.

Thanks

I posted this problem more than a week ago. I have done NOTHING.

Now, it is back to normal!

I guess it was the address synchronisation in the cloud, because now my address book has tripled in size, collecting from iPhone, iPad and Mac!

This morning 4 hours after starting from 100% I am still at 93% (always on, not much use, just emails)

Exactly. The issue is so noticeable that I even cursed my laptop battery. Its just a few months old but I thought to get it replaced. Then i get these comments on the web. And now i am relaxed that its not just me but mostly everyone who is on beta.

Hopefully, every new beta will improve

Experiencing the same battery issue - fast drainer after installing Mojave. Definitely the new OS is the culprit. Please find a solution to this or else the good imagery of this OS is a failure on its performance debu.

I will confess that I haven't read all 11 pages here, but I've read much of it and if this helps someone, then great. I believe apple will fix this in a future point release.

I have a Late 2013 13" MBP Retina. I'm having the same problem as most others. Laptop is warm in the bag and ~20% down in a few hours. Last night, I disabled wifi before closing the lid at 100%. This morning, when I woke up, the laptop was at 99% and cool to the touch. When I left to come to work, I left wifi on, and when I got to work and opened the laptop ~2 hours later, the laptop was not cool to the touch and at 90%. I used it until 79%, turned wifi off and closed the lid over lunch. 1 hour later, laptop was cool to the touch and at 78%.

I have tried PRAM and SMC resets to no avail. I have not tried a clean install or disabling bluetooth yet, but I will if a point release doesn't fix it soon. Until then, I plan to sleep with wifi off.

I've tried multiple times sleeping with wifi turned off on my Air 2015 and no luck. I don't think anyone's been able to pin point the root of the problem. Some people have different things going on.

They should not have released such a buggy os, I'm going to revert back to Sierra 10.12.6 as that was working perfectly for me...

Resetting the PRAM and SMC has not fix things for me. - 2015 MBP 13" Retina. Have done resets twice now and no noticeable difference in battery drain. I'm losing 45% battery over 12 hours sleeping. I used to only lose 5% during the same period on High Sierra.

Got the same issue. For me, it looks like one app, maybe Safari could be the root facing this issue. I tried let my MacBook Pro 13" 2017 (2 TB3 Ports) sleep one night without any application open, got 5% draining which is a bit more than I had before Mojave. The last night, I came from work and don't touched my MacBook anymore, this morning I got over 20% draining.

2018-10-12 14:07:38 +0200 Sleep Entering Sleep state due to 'Clamshell Sleep':TCPKeepAlive=active Using Batt (Charge:100%) 349 secs 2018-10-12 14:13:36 +0200 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=active Using Batt (Charge:100%) 1975 secs 2018-10-12 14:47:01 +0200 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=active Using Batt (Charge:100%) 746 secs 2018-10-12 14:59:58 +0200 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=active Using Batt (Charge:100%) 14508 secs 2018-10-12 19:02:16 +0200 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=active Using Batt (Charge:94%) 15169 secs 2018-10-12 23:15:05 +0200 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=active Using Batt (Charge:87%) 6437 secs 2018-10-13 01:02:53 +0200 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=active Using Batt (Charge:84%) 3948 secs 2018-10-13 02:08:41 +0200 Sleep Entering Sleep state due to 'Maintenance Sleep':TCPKeepAlive=inactive Using Batt (Charge:82%) 8483 secs 2018-10-13 04:30:04 +0200 Sleep Entering Sleep state due to 'Sleep Service Back to Sleep':TCPKeepAlive=inactive Using Batt (Charge:80%) 14503 secs 2018-10-13 08:31:47 +0200 Wake Wake from Deep Idle [CDNVA] due to EC.DarkPME EC.ACAttach/Notification: Using AC (Charge:78%) 10 secs 2018-10-13 08:31:57 +0200 Sleep Entering DarkWake state due to 'Maintenance Sleep':TCPKeepAlive=active Using AC (Charge:78%) 17 secs 2018-10-13 08:32:14 +0200 Wake DarkWake to FullWake from Deep Idle [CDNVA] due to HID Activity: Using AC (Charge:78%)

Thats too much, in my opinion. Application running so far: iTerm (no running SSH sessions), Atom, Safari, Mail, Outlook, Contacts, iMessage, Telegram. None of this applications was shown preventing sleep in Activity Monitor. I already tried SMC reset etc. etc. doesn't solve this issue. It's quite hard to debug, it could be nearly everything, I guess.

So Apple, it would be cool to get some help here. I'm sure this issue can have impact the overall battery health.

Cheers,

Ole

I noticed a battery reduction of 1% in 2 hrs with "Dark (Still)" while a reduction of 2% in 1 hr with "Dynamic Desktop", both in sleep mode. This indicates that the "Dynamic Desktop" is consuming approx. 4 times energy than "Dark (Still)" even in sleep mode.