Puslar/Electron very slow on macOS Tahoe

[jlayt]

Thanks in advance for your bug report!

• [x] Have you reproduced issue in safe mode?
• [x] Have you used the debugging guide to try to resolve the issue?
• [x] Have you checked our FAQs to make sure your question isn't answered there?
• [x] Have you checked to make sure your issue does not already exist?
• [x] Have you checked you are on the latest release of Pulsar?

What happened?

Performance on the newly released macOS Tahoe is super slow and laggy. There is an issue in the Electron framework that causes this that they have patched. If possible can you please release a version for macOS that includes the required patches? Thanks!

https://www.theregister.com/2025/10/02/macos_26_electron_slowdown/

Pulsar version

1.129.0.arm64

Which OS does this happen on?

🍎 macOS

OS details

macOS 26 Tahoe

Which CPU architecture are you running this on?

ARM64/AArch64

What steps are needed to reproduce this?

Upgrade macOS to Taho, run Pulsar, and wait...

Additional Information:

No response

[savetheclocktower]

Oof.

We're stuck on Electron 12 and have been for a few years. We're hoping to upgrade to Electron 30 within the next month or so — and hopefully after that we'll be able to jump to a modern (supported) version of Electron and continue to stay up-to-date.

So this definitely dials up the urgency! Thanks for the report.

[savetheclocktower]

That article links to a couple of workarounds that users can try if they're affected by this.