An app runs slow on Apple Silicon and the fan blasts
Many older apps still run under Rosetta 2 and burn CPU. A native ARM build typically halves both speed and heat.
Try this first
- 1Open Activity Monitor and check the Kind column for Apple or Intel
- 2Look for native versions in the App Store or vendor site
- 3Uninstall the old Intel build cleanly before installing the new one
- 4Verify helper tools and plugins are native too, often forgotten
When to bring us in
For a dev stack that will not go native: build under arm64 with Homebrew arm instead of a Rosetta shell.
See also
- My laptop is suddenly slowThree main suspects: a runaway background process, near-full disk, or a Windows update in progress.
- One specific application is slow for everyoneIf an app is slow for one person: local. For everyone at once: server side or vendor side.
- Opening files from the file server takes minutesOften the server itself is fine and the issue is network routing or stalling DNS resolution.
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