Comment by noname120
I have a powerful MacBook Pro M2 Max with 32 GB of RAM. I updated it to macOS 26 since that it became a lot slower than my MacBook Air M1 with just 16 GB of RAM that I left on macOS Sequoia 15.7.x… What an irony given that my MacBook Pro has way better hardware specs.
Do you happen to have an app on this list open (https://avarayr.github.io/shamelectron/) ?
There is a bug in Electron caused by the use of a private API that slows down macOS 26 significantly. It’s fixed in Electron but not all Electron apps have updated to the new version yet. Apparently it’s fixed in macOS 26.2