Lost license key
Your key is shown on the confirmation page right after purchase — you can find it again by reopening the same "Thank you" link from your browser history, or by searching for the Stripe receipt e-mail (it contains the session identifier you need).
Direct e-mail delivery of the key is being rolled out. In the meantime, or if neither method works, write to us with your Stripe receipt :
Contact support
Activate your license
Once you have your key :
- Open Sourdine on your Mac ;
- Dashboard → "Activate Sourdine" card (or Settings → License) ;
- Paste the key, then Activate.
The optimization engine activates immediately, no restart required.
System requirements
Sourdine requires :
- macOS 13 (Ventura) or later ;
- Apple Silicon (M1 chips and later) — Intel Macs are not supported.
Download from the home page ; installation requires no external dependency.
Refund
30-day money-back guarantee, no questions asked. Write to sourdine@radnoumane.com or reply directly to your Stripe receipt within this window : the refund is issued to the original payment method.
Full details in the terms of sale.
Other frequently asked questions
Does Sourdine slow down my background applications?
Depends on the chosen policy : "muted" hands the app to macOS's E-core scheduling preference (it keeps running, potentially a bit slower in the background) ; "frozen" suspends it completely (0% CPU) until you bring it back to the foreground, where it resumes instantly.
Is telemetry mandatory?
No. It's off by default, opt-in, and revocable at any time from Settings with no impact on your license. Details in the privacy policy.
Can I use one license on multiple Macs?
Yes, a purchased license covers all of your personal Macs.
Is the source code open?
Sourdine is a native Swift utility with zero dependencies ; for any technical question about how it works, write to us.