# How to Redact a PDF on Mac

> To redact a PDF permanently on Mac, do not use Preview's markup tools. Use Adobe Acrobat Pro, a dedicated redaction app, or export to Word and back.

- **Author:** Neetusha
- **Published:** 2026-04-26
- **URL:** https://www.redactifyai.com/answers/how-to-redact-pdf-on-mac/

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To permanently redact a PDF on Mac, do not use Preview's markup or highlight tools. They only cover text visually and the original content remains recoverable. Use Adobe Acrobat Pro's Redact tool, a browser-based redaction app like RedactifyAI, or export the PDF to Word, replace the sensitive text with placeholders, and re-export. Always verify by copying the redacted area to confirm no text remains.

## Why Preview is not safe

Preview is the default PDF viewer on macOS, and many users assume its annotation tools redact properly. They do not. The Markup toolbar's rectangle, highlight, and pen tools all overlay shapes on top of the existing text. The text stays in the file content stream. Anyone who opens the file in another PDF viewer, copies the area, or runs a text extraction command can recover it.

## Three actually-safe methods on Mac

1. **Adobe Acrobat Pro for Mac**: Tools > Redact > Mark for Redaction, then Apply. Removes underlying text. Paid, $19.99/month. Limited PII auto-detection.
2. **Browser-based redaction tools**: RedactifyAI runs in any browser on Mac. Upload, AI detects PII, you review and approve, download the permanently redacted file. Free tier covers 10 pages per month.
3. **Export to Word, redact, re-export**: Open the PDF in Word for Mac (or Pages), use Find and Replace to swap sensitive text for `[REDACTED]`, run Document Inspector to clean metadata, then export back to PDF. Tedious but works without paying for Acrobat.

## Common Mac-specific mistakes

Three traps catch Mac users repeatedly. First, using Preview's "Black Out" annotation thinking it deletes text, it does not. Second, exporting from Preview as "Reduce File Size" PDF and assuming the export strips redactable content, it does not. Third, dragging a black rectangle over text using the Shape tool: same problem, the text remains underneath.

**Try it free:** RedactifyAI runs in any Mac browser, no install. AI detects PII automatically and applies permanent redaction. [Try it at redactifyai.com](https://redactifyai.com). Free tier available, no card required.