How Can I use XeTeX do produce a PDF/X file?

I am using the XeTex typesetting system on a Macintosh running Snow Leopard. I would like it to produce a PDF/X-1a file.

Given that ghostscript can't create a pdf/x-1a, I think conversion is your best bet.

Using Acrobat Pro

• Read in a ps/pdf file and export to pdf/x-1a.

Using pstill

• Pstill which is free on linux can save to pdf/x-1a. you can put linux in a vm, and add that to your workflow. hacky, but free. if you want less hacky, you can pay for the mac version.

Using Preview

• You can use preview to save as a pdf-x. open your ps/pdf file and select save as. choose the pdf format and create generic pdfx-3 document quartz filter. If the result is too low resolution, use this colorsync method.

• You can also just print, and in the pdf button on the lower left side of the dialog, select save as pdf-x.*

It seems it should be possible with this package and pdfTeX. From the site:

The package helps LaTeX users to create PDF/X-1a and PFD/A-1b compliant pdf documents with pdfTeX.

The authors are C. V. Radhakrishnan and Hàn Thế Thành.

What distribution and front-end (if any) are you using?

Edit: found the package on ctan as well.