Some macOS 12.2 users are experiencing Bluetooth-related battery drain issues in sleep mode

Apple released macOS Monterey 12.2 earlier this week, and some Mac users who installed the software update are experiencing excessive battery drain in sleep mode, which appears to be caused by Bluetooth accessories frequently waking the computer.

Affected users said that since updating to macOS 12.2, their Mac's battery life dropped from 100% to 0% while in sleep mode at night. Some users tried to figure out the cause in Terminal and found that Bluetooth accessories often caused a "deep idle DarkWake" that caused the Mac to repeatedly wake from sleep, draining the battery. The issue appears to affect both Intel-based Macs and M1-based Macs.

The problem goes away when Bluetooth is disabled or all Bluetooth accessories disconnect from your Mac, but it's not an ideal solution. Apple released the first beta version of macOS 12.3 earlier this week, but it's unclear whether that version fixes the issue.

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