macOS 26.01 Partially Fixes Electron Performance Issues
macOS users have been facing performance issues with multiple Electron-based applications running due to backported fixes in Electron. Apple's recent macOS 26.01 update has partially addressed AutoFill issues, but some problems persist.
Electron, a popular framework for building cross-platform apps like Microsoft's Visual Studio Code and Slack, has been affected by recent changes. Developers must rebuild and deploy their apps using the fixed version to avoid poor performance. The Rust-based Zed editor has also experienced Tahoe issues related to AutoFill changes, affecting Chromium-based applications.
The Electron team has identified and resolved a code issue causing system-wide slowdowns on macOS 26 'Tahoe'. However, another issue related to password AutoFill can still cause slow scrolling in Chrome and Chromium-based apps, impacting early macOS 26 adopters. Apple's recent update to macOS 26.01 has improved the AutoFill issue, but it's not yet fully resolved for Chromium-based applications.
A script can help users list their Electron apps and their versions, showing how many are installed and out of date. The fix for the window shadow calculation issue removed an override that broke a new macOS optimization, causing WindowServer to repeatedly recalculate and repaint the shadow.
While Apple's macOS 26.01 update has partially addressed AutoFill issues, some problems persist for Chromium-based applications. Electron developers must rebuild and deploy their apps using the fixed version to avoid performance issues. Users can use a script to check their Electron apps' versions and ensure they're up to date.
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