Black first. Clear later.
A detection covers the preview immediately. Clean checks run in three-scan bursts every 200 ms, then the app waits one full stream delay before showing video again.
macOS 13+ / local processing / open source
Your stream can wait. Your privacy can’t.
PII Guard delays the screen preview you share. The moment visible Accessibility text contains sensitive data, the whole stream goes black.
customer note
Send the follow-up to
demo@example.com
demo@example.com
Account review is ready for the call.
PII detected
preview protected instantly
delay 2.0s1080p / 15 fpsarmed
Share the preview window. Keep the raw display to yourself.
No image analysis.
Detection reads text that apps expose through macOS Accessibility. There are no screenshots, OCR jobs, uploads, or remote APIs.
on device
Safe mode asks you.
After the stream becomes clean, PII Guard can keep it blocked until you confirm “It’s safe now.”
Tune the stream.
Pick the delay, resolution, frame rate, cursor visibility, detection rules, and clearance policy from the app.
Record what viewers see.
Save the protected delayed output to MP4, including every blackout frame.
Delay.
The preview starts black while the stream buffer fills.
The preview starts black.
Checks wait for the configured stream delay, so nothing unverified appears at startup.
Any match blocks now.
Email, phone, payment card, PESEL, IPv4, and custom phrase checks run independently of frame rendering.
Clean means clean in the buffer.
After enough clean bursts, the app waits the current preview delay before it reveals the stream.
You can keep the final say.
Safe mode holds the blackout until the notification, dialog, or control-panel button gets your approval.
Build it locally.
PII Guard is currently distributed as source while I work on obtaining an Apple Developer license. The installer sets up Apple’s Command Line Tools when needed, builds the app on your Mac, installs it in Applications, and cleans up after itself.
Support the project on Ko-fi- macOS 13 or newer
- full Xcode is not required
- Accessibility and Screen Recording permissions stay local
Terminal
curl -fsSL https://install.pcstyle.dev/stream-guard.sh | bashone command. source is public.