Álvaro Ramírez

If you ever need to thumbnail a pdf page, imagemagick has got you covered. For example, to thumbnail page 3, you can use:

convert path/to/input.pdf[2] path/to/output.png

convert -resize 10000x10000 path/to/input.pdf[2] path/to/output.png
convert: FailedToExecuteCommand `'gs' -sstdout=%stderr -dQUIET -dSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=2 '-sDEVICE=pngalpha' -dTextAlphaBits=4 -dGraphicsAlphaBits=4 '-r72x72' -dFirstPage=3 -dLastPage=3 '-sOutputFile=/var/folders/2y/nj_s07ms7l5gfsffh89_79zm0000gn/T/magick-30950xzlPsgqGUwtA%d' '-f/var/folders/2y/nj_s07ms7l5gfsffh89_79zm0000gn/T/magick-30950jpGyui82uGOQ' '-f/var/folders/2y/nj_s07ms7l5gfsffh89_79zm0000gn/T/magick-30950cuDVTNjArshs'' (1) @ error/pdf.c/InvokePDFDelegate/292.

However, I had the error above (missing gs), resolved by installing ghostscript.

brew install ghostscript