Acrobat Reader crashes when compressing PDFs exported from Keynote

​@Monitorhead This is a problem that people have seen before. It happens when Keynote makes a PDF file and Acrobat tries to make the file smaller.

If you need something that works for now you can try PDFWix. It is free. You do not have to give them any information about yourself. PDFWix can handle PDF files made by Keynote without freezing or crashing. This is really helpful when you just need something that works.

The person who wrote before you is right to be worried, about security if you are working with important documents.. If you are just making a regular presentation PDFWix is a good choice. It is fast. It works well.

I hope Adobe fixes this problem soon. A lot of people have told them about it so they should make it right.

@Monitorhead Unofrtunately, it isn't just Adobe.... so, unless you have the 'power' to let Apple to get their stuff put-together, it isn't 100% all of Adobe's fault! It is a compatibility issue between the way Keynote exports PDFs and how Acrobat's compression feature processes them, often leading to crashes or freezes. Apple's internal PDF library (used by Keynote) and Adobe's PDF library (used by Acrobat) can sometimes have subtle differences. When Keynote exports a PDF, it may contain certain elements or data structures that Acrobat's compression algorithm has trouble parsing, especially with images.

How come you don't use Apple's built-in Preview app? Typically, this app often fixes whatever issue was preventing Acrobat from compressing the original file. You can then open this new PDF in Acrobat and compress it further if needed. Or if you still wanting it as a Presentation, export/save as a PowerPoint (.pptx) file first. Then, open the .pptx file in PowerPoint and export it as a PDF from there. The PDF generated by PowerPoint is more likely to be compatible with Acrobat's compression tools.