[cups] Trying to work around Canon MF743cdw driver bugs on MacOS Catalina

[Helge Blischke]

> Am 29.05.2020 um 08:09 schrieb Brian Demsky <bdemsky at gmail.com>:
> 
> Doesn’t work on MacOS.  The filter runs from the command line fine.  I have gs installed in /opt/local/bin/gs.  But it doesn’t work.  I’m wondering if this is some sort of OS X security sandbox thing?
> 
> I get the following error in the printer log:
> D [28/May/2020:23:05:33 -0700] [Job 167] printer-state=3(idle)
> D [28/May/2020:23:05:33 -0700] [Job 167] printer-state-message="/opt/local/bin/gs -dNOPAUSE -dNOPROMPT -sDEVICE=pdfwrite -sstdout=%stderr -sOutputFile=%stdout -dAutoRotatePages=/None -dAutoFilterColorImages=false -dNOPLATFONTS -dColorImageFilter=/FlateEncode -dPDFSETTINGS=/printer -dColorConversionStrategy=/LeaveColorUnchanged -f /private/var/spool/cups/d00167-001 -c quit: Operation not permitted"
> D [28/May/2020:23:05:33 -0700] [Job 167] printer-state-reasons=none
> D [28/May/2020:23:05:33 -0700] [Client 18] HTTP_STATE_WAITING Closing for error 32 (Broken pipe)
> 
> I’m okay printing on my side by just hacking the PPD to use the printer’s native PDF support.
> 
> Brian

It seems that process-exec from /opt/local/bin is denied by the SIP (System IntegrityProtection).
From my experience, /usr/local/bin is not protected, and the precompiled Ghostscript provided by the TexLive package
gets installed in /usr/local/bin and is known to work under Catalina.

Helge