An Electron bug that clashed with macOS 26 Tahoe’s graphics engine caused apps like Slack, Discord, and VS Code to slow down Macs, but new updates finally fix the issue.
Electron apps don’t play nice, sometimes
Electron apps don’t play nice, sometimes
After macOS 26 Tahoe launched in September 2025, users noticed their Macs acting sluggish especially after a long runtime of some apps. Simple actions like scrolling or switching windows lagged, and fans spun up with no clear cause.
The common factor was Electron, the cross-platform application framework that powers Slack, Discord, Figma, and dozens of other apps. But the slowdown wasn’t random, according to a report from Shameelectron.