Great to find this posting.

I've been having this problem ever since I got a M1 MacBook Air with BigSur 
at the start of the year.

I couldn't find any references when I encountered it and put it down to 
something to do with BigSur and ARM.
I've reinstalled Pandoc and PdfLatex several time but never resolved.
I've just don't another reinstall and then stumbled on John's fix which 
works for me - thanks!

Something I noticed in the process: a really small file will process 
correctly:

# Hello world

## Hello world

### Hello world

Hello world

pandoc hello.txt -o hello.pdf 

Works.
You can add a few more paragraphs (approx 5) to hello.txt before I get the 
error - which hints that there is some actual resource exhausted happening. 
But why would that be fixed by specifying the path? Dunno.

Thanks for the fix, hope we can find a solution before long

allan


On Wednesday, 9 June 2021 at 16:40:37 UTC+1 John MacFarlane wrote:

> "Jason Davies" <ophi...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:
>
> > Hi folks,
> >
> > I just tried to convert three short Word files one at a time; one worked 
> > fine but two gave errors like this:
> >
> > pandoc(24405,0x209984e00) malloc: can't allocate region
> > :*** mach_vm_map(size=1048576, flags: 100) failed (error code=268435465)
> > pandoc(24405,0x209984e00) malloc: *** set a breakpoint in 
> > malloc_error_break to debug
> > pandoc: pdflatex: createProcess: runInteractiveProcess: exec: resource 
> > exhausted (Cannot allocate memory)
> >
>
> I just got an M1 mac, and I ran into this same error.
>
> I found that if I fully specify the pdflatex path, it works:
>
> pandoc -o my.pdf --pdf-engine=/Library/TeX/texbin/pdflatex
>
> It's a bit mysterious why this should be needed, since
> `which pdflatex` returns this path!
> And running pandoc with --verbose shows that the PATH is
> correctly passed through to the process running pdflatex.
>
> Anyone have any ideas? AT least this gives a workaround...
>

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