**Title: macOS Tahoe 26.2: Fixing Electron App Rendering Challenges**
Following the release of macOS Tahoe, users faced notable performance challenges associated with Electron applications. Developers identified that these apps were overloading the Mac’s rendering system because of their alterations to the default window corner mask. This incompatibility resulted in stuttery scrolling and other performance issues not only within Electron apps but also in various applications when an Electron window was active.
To resolve this concern, leading Electron-based applications have issued updates to reduce performance decline. However, this necessitated users to wait for each developer to provide fixes for every Electron app installed on their devices. Thankfully, with the rollout of macOS Tahoe 26.2 betas, Apple has introduced a system-wide remedy that addresses the root incompatibility.
The issue was initially brought to attention by developer @Normarayr, who compiled a list of troublesome Electron applications. With the upgrade to macOS 26.2, this list will become redundant as the rendering system will no longer be vulnerable to overload from Electron apps.
The core issue originated from Electron apps using a private AppKit API in a manner not endorsed by Apple. The utilization of private APIs is heavily discouraged and explicitly forbidden in the iOS App Store guidelines because of the potential complications like those encountered by macOS users.
Rather than waiting for all Electron applications to amend their coding approaches, Apple proactively acted by instituting a fundamental fix in Tahoe 26.2. This measure guarantees that no application can adversely affect the system’s performance in this manner going forward.
At present, macOS Tahoe 26.2 is in developer beta and is anticipated to be accessible to all users in December. Alongside addressing the Electron app challenges, this update will also introduce performance and stability improvements, a new Edge Light feature for enhanced webcam lighting, and compatibility for higher performance Thunderbolt 5 connections for multi-Mac clustering.
