CalcLockAt a glance: Build the PDF from a deliberate selection, not an entire folder by accident. Inspect page order, crop, legibility, metadata, and any password requirement on the saved result.
Choose a PDF because it helps the reader
A PDF can keep a sequence of images in one file for a review, application, or project discussion. It is useful when page order and a single attachment matter more than editing each image separately. It is less useful when the recipient needs original image files or the full resolution for their own production work.
Start with a clean folder containing only the images intended for this audience. Remove unrelated working copies from the selection, without deleting your source archive. Decide the order in advance and use numbered working filenames if that makes the sequence easier to verify.
Open the selection together in Preview
Open the selected images in one Preview window and show the thumbnail sidebar. Confirm that every intended image is present and no private reference image slipped into the selection. Check orientation before building the PDF so the reader does not have to rotate alternate pages.
Review the sequence visually rather than relying on file dates alone. A download date or filename order may not match the story you want to tell. If you need section titles or substantial explanations, a document authoring app may be a better starting point than a bare collection of pictures.
Set up the print layout
Choose File > Print. Preview supports printing selected thumbnails and choosing image fit or fill behavior. Select the intended pages and use one image per page for a straightforward review packet unless a contact sheet is genuinely more useful. Check the paper size and orientation in the print preview.
Favor keeping the entire image when the edges contain relevant details. A fill setting may crop material to suit the page proportions. For a series of documents, inspect whether page numbers, signatures, or small text near the edge remain visible and large enough to read.
Save through the PDF menu
In the macOS print dialog, use the PDF menu and choose Save as PDF, then give the file a clear name and destination. Apple's instructions also describe Security Options for requiring a password to open a document. Use those when they fit the recipient's workflow and your needs.
Do not select an email or cloud destination by accident when your immediate goal is only to create a local file. Keep preparation and sending as separate decisions. If you need password protection, use a strong password and agree on an appropriate separate way to provide it to the intended reader.
Reopen the result and inspect every page
Close the creation workflow and open the saved PDF itself. Count its pages, compare the order with your plan, and examine the first and last page carefully for omissions. Scroll through the whole file at a useful zoom and confirm that small text remains readable.
Inspect the document information for an unwanted author name, title, or keywords. If you used an opening password, test that the saved copy actually requests it when opened afresh. A password can restrict access to the file, but it does not prevent an authorized reader from photographing or otherwise reproducing what they can see.
Check suitability before delivery
A PDF made from images is not automatically searchable or accessible. If the reader needs selectable text or screen-reader support, prepare and validate those features in an appropriate tool. Do not mistake a visually correct page for a complete accessible document.
Keep the source images and the final PDF separately. Attach only the reviewed file, confirm the recipient or sharing permissions, and verify that any size limit is satisfied. If you subsequently change page order, compress the PDF, or redact content, repeat the inspection on that new output rather than relying on checks of an older version.
Questions, answered
Does saving images as PDF remove their private information?
No. Review visible content and document information independently. A PDF can preserve information you did not intend to disclose, and password protection does not substitute for choosing appropriate content.
Should I compress the PDF before checking it?
Inspect it first, then compress only if needed and inspect the compressed result again. A smaller file is not useful if page detail or small text becomes unreadable.