MacBook Pro 2019 Power issues after macOS 26 update

I’d suspect some installed apps causing issues, or a failing battery or other hardware issue in a five year old Mac.

The few local Mac laptops with the last few generations of Intel processors have sometimes been flaky.

Run hardware diagnostics. Those can find some hard errors, but will often miss transient hardware errors.

Check the battery condition and cycle count, too.

Wipe and reinstall a clean copy of macOS and current apps, and test again. Avoid installing add-on security or add-on cleaner or add-on privacy or related apps, for the purposes of testing. This reinstall tends to remove installed apps as a potential cause.

Failing that, I’d contact Apple Support.

Zeeie wrote:

The moment macOS 26 was installed the battery began to discharge at a rapid pace, even though the device was plugged in. Once the battery died, the regular charger would not charge the laptop. Plugging in another Mac charger which allowed the laptop enough charge to try a SMC reset, which did not correct the issue. I repeated the same steps and I booted into recovery mode and the battery charged regularly while in recovery mode. I did a recovery just to make sure, system restarted and booted successfully. Only to find the laptop dead in the morning. I repeated the steps (minus the full recovery) and booted correctly after charging.

To me this points to an issue with macOS 26, since the battery charges fine in recovery mode and I did not have any issues in macOS 18.

Thoughts?

MacBook Pro 16″, macOS 26.0

first I heard this related to macOS 26.

I am not aware of a macOS 18 (?) however or you referring to iOS 18 for the iPhone...that would be separate device/issue.

It is unclear from your post if this is Intel or M-series computer you do not clarify the details.

I would suggest you try SafeBoot Start up your Mac in safe mode - Apple Support will sort many anomalies

Login and Reboot as normal and compare those results going forward.

To be proactive you can file a bug report / submit your Apple Feedback here: Product Feedback - Apple

Call Customer Support (800) MY–APPLE (800–692–7753)

or on line https://getsupport.apple.com/

or call AppleCare Support at 1-800-APLCARE (800-275-2273)

Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

Contact Apple Support - Apple Support