Battery Draining Fast since Tahoe upgrade

I have a 14" M4 Pro MBP and ever since I upgraded to Tahoe the battery is draining incredibly fast. Has anyone else had this and if so have you been able to mitigate it?

MacBook Pro (M4)

Posted on Sep 18, 2025 8:48 AM

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Posted on Oct 5, 2025 8:31 AM

I've been able to sort out what was causing it for me on my 14in MacBook Pro with M4 MAX 64gb . I had tried booting in safe mode, disabling all safari extensions, and reinstalling Tahoe. None of those resolved my issue.


It turns out two electron based apps were to blame, specifically Slack and VSCode for me. I used to have these apps open and running in the background all the time but after hard quitting those apps, my battery performance returned to normal (basically a full day or two, on a full charge).


I found this via a reddit thread. Folks are saying it has something to do with how those apps render shadows and how that affects the window server process.

44 replies

Dec 1, 2025 8:50 AM in response to slythespacecat

I was slightly upset, I exaggerated (I hadn't checked, it really seemed like 3 hours...). Reality is not that much better tho. It's less than 6 hours per cycle consistently. This shouldn't happen in an M3 Pro with a normal battery health. This is atrocious work, man. Isn't this just obliterating the longevity of machines for users that need VS Code (or any Electron app)? Plus, it's been 2 months already. We're up to 26.1 and they still haven't fixed this.



[Edited by Moderator]

Sep 18, 2025 8:56 AM in response to erikbock

That should be expected while spotlight is indexing files in the background and optimizing object detection on your photo library after an update. Give it 3-4 days and leave the Mac plugged in when near a power source. Large Photo libraries may take a day or two longer.

About Apple software updates - Apple Support


It really should not take long to index files with the speed of the M4 as long as the computer is not shut off to prevent it from indexing.

Nov 29, 2025 7:42 AM in response to erikbock

I have 26.1 and am still having the issue. 16-inch MacBook Pro M4 Max on Tahoe 26.1. Issue was bad with 26, but is pretty much the same on 26.1. I also have slack, which I'm going to try manually quitting next time I let it sleep unplugged. It goes from fully charged to zero overnight every night since Tahoe if it is not plugged in and also is getting exceptionally hot during charging sometimes. It's been on Tahoe for plenty of time to have completed all indexing.

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Battery Draining Fast since Tahoe upgrade

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