Server Version#: 4.147.1 (mac)
opened 11:32PM - 12 Sep 25 UTC
closed 07:41PM - 26 Sep 25 UTC
platform/macOS
performance
bug
37-x-y
38-x-y
### Maintainer update
From @MarshallOfSound (https://github.com/electron/electr… on/issues/48311#issuecomment-3304577581):
> Hey folks, anyone experiencing this issue can you please raise a Feedback (via Feedback Assistant) with Apple. Make sure you send it while the issue is occurring and ensure you include a sysdiagnose with your report (I think that's automatic now, but check the box if there's a box).
>
> We need a lot more to go on and this is likely a macOS issue.
### Preflight Checklist
- [x] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/main/CONTRIBUTING.md) for this project.
- [x] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/main/CODE_OF_CONDUCT.md) that this project adheres to.
- [x] I have searched the [issue tracker](https://www.github.com/electron/electron/issues) for a bug report that matches the one I want to file, without success.
### Electron Version
37.3.1
### What operating system(s) are you using?
macOS
### Operating System Version
macOS 26 Tahoe RC
### What arch are you using?
arm64 (including Apple Silicon)
### Last Known Working Electron version
N/A, issue only persists since macOS 26
### Does the issue also appear in Chromium / Google Chrome?
No
### Expected Behavior
Smooth 120fps experience even when Electron-apps are open or not minimized
### Actual Behavior
Using an M1 Max MacBook Pro, having Electron-based apps open / not minimized causes a huge lag.
CPU and GPU usage remains low, but if I have Discord and VS Code open, moving windows, scrolling is stuttery. It happens even when only Discord is open but it gets worse if I open a second Electron app.
This is kind of weird because while having Discord open and I'm in Chrome, the lag still occurs, but it's fixed if I minimize Discord (even though Chrome is fully in focus and maximized). This happens since upgrading to macOS 26 RC, macOS 15 didn't have this issue.
There is a similar lag if I open Settings - Wallpapers, moving the Settings window is laggy then (looks like 60fps instead of 120).
### Testcase Gist URL
_No response_
### Additional Information
_No response_
elan
November 1, 2025, 6:08pm
2
We’ll have an update shortly.
1 Like
