macOS Tahoe Update Linked to Battery Drain, New Guide Outlines Fixes

Overview

• Users upgrading to macOS Tahoe report noticeably shorter run time, with some anecdotal claims of roughly a 20% drop in the first days.
• Early battery loss is often tied to Spotlight and Photos reindexing after installation, which typically eases once those processes complete.
• Longer‑lasting drain can stem from the Liquid Glass interface, Apple Intelligence features, background syncing, and app incompatibilities that increase system load.
• The guide advises monitoring Energy Impact in Activity Monitor, lowering display brightness, shortening sleep intervals, and disabling unneeded background services and iCloud syncing.
• It notes the issue affects newer Macs and older Intel models, and it recommends checking battery health and staying current as Apple typically ships incremental fixes.