Running OCR on a PDF on Mac is straightforward — Preview handles basic cases natively, and a couple of dedicated tools cover everything else including scanned documents and batch processing. Here's what works and when to use each option.
Does Mac Have Built-In OCR?
Yes — macOS has had built-in text recognition since macOS Monterey (12.0). It's called Live Text, and it works across the system, including in Preview. Open a scanned PDF in Preview, and you can often select, copy, and search text directly — macOS recognizes the text on screen in real time without you needing to run a separate OCR step.
The limitation is that Live Text doesn't embed a text layer into the PDF file itself — it recognizes text for on-screen interaction only. If you need a PDF with a proper embedded text layer that's searchable in other apps, on other devices, or in document management systems, you need a dedicated OCR PDF tool.
How to OCR a PDF on Mac Using WukongPDF
Open WukongPDF's OCR PDF tool in Safari. Upload the scanned PDF, select the language of the document content, and click Convert. The tool processes each page and embeds a searchable text layer in the output. Download the result — the PDF now supports text selection, Ctrl+F search, and indexing by any system or app that processes PDFs.
This works on any Mac, any macOS version, and requires no installation. It's particularly convenient for users who only occasionally need OCR and don't want to install dedicated software.
OCR on Mac Using Adobe Acrobat
Adobe Acrobat Pro for Mac provides the most control over OCR settings. Open the scanned PDF, go to Tools > Scan & OCR > Recognize Text > In This File. Before running, click the Settings gear to choose the language, output style (searchable image, or editable text), and DPI. Click Recognize Text to process the document.
The Searchable Image output style keeps the original scan appearance while adding a hidden text layer — the standard choice for archiving. The Editable Text option attempts to replace the scanned image with actual reflowed text, which works well for clean typewritten documents but can look messy on documents with complex layouts.
Free OCR Options on Mac
Several free options work well on Mac. Tesseract is a powerful open-source OCR engine installable via Homebrew (brew install tesseract). It runs from the Terminal and supports over 100 languages. For a graphical interface around Tesseract, PDF OCR X Community Edition is a free Mac app that provides a drag-and-drop interface for running OCR on PDFs.
For most users, a browser-based OCR PDF tool is more accessible than command-line Tesseract, and the output quality is comparable for standard printed documents.
After OCR: Compressing the Output
OCR output files are sometimes slightly larger than the input because the tool embeds additional text data alongside the original image. Running the searchable PDF through a PDF Compression tool afterward brings the file back down without affecting the text layer. For scanned documents going into a long-term archive, this compression step is worth doing before storing or uploading.