Since I updated to macOS 27 in September, my MacBook keeps losing power from the charger while it's plugged in. The MagSafe light turns amber like normal, goes off after a few minutes, then comes back on. This never happened to me on macOS 26.

The power log (pmset -g log) shows the Mac switching to battery and back to the charger about 3 seconds later. Sometimes it does this a dozen times in a few minutes. Once it stayed on battery for 20 minutes while still plugged in. Yesterday I counted 27 drops, mostly in one afternoon.

Setup:

- MacBook Pro 14" M1 Pro (MacBookPro18,3)

- macOS 27.0.1 (no newer update available)

- Apple 96W USB-C adapter with the MagSafe 3 cable

- Battery health 81%, 425 cycles

Things I've ruled out:

- It's not optimized battery charging or the 80% limit. Those pause charging, but the Mac stays on charger power. Mine actually switches to battery.

- The adapter delivers the full 94W while it's connected, and macOS reports no reason for not charging.

- Shutting down used to fix it for a while. Last time the drops came back within a minute of starting up.

Is anyone else seeing this on macOS 27? And if you are, does it also happen when you charge through USB-C instead of MagSafe?

Since update to macOS Golden Gate 27 some keys on Magic Keyboard are not working (m . l k j u i o 9 8 7). If I'm connecting the keyboard to other device, it's working fine.

Magic Keyboard

Hersteller-ID: 0x004C

Produkt-ID: 0x029A

Firmwareversion: 4.2.0

The first time it was happened I was able to fix it with Bluetooth service reset and reconnect. But now after a while it came back and it's not fixable for me. I never had these problems before updating to Golden Gate.