After some research, I found that the issue is with the current version of ghostscript (9.27). It occurs on a Mac, with ImageMagick (and ghostscript) installed via Macports. The solution is to downgrade to the prior version of Ghostscript. Here are a list of commands in case anyone can benefit from them: git clone --single-branch https://github.com/macports/macports-ports.git cd macports-ports git checkout af11993aab38d7ba77c2df895aa5ce9b405c5681 cd print/ghostscript sudo port install When asked...
Abort trap: 6
pdfsandwich failes after 'convert' error