Hi I just want to say same thing is happening to me. 

MacBook Air M1 16GB RAM with macOS Big Sur 11.4.

I'm trying to convert a .md to beamer slides using the following command:

pandoc -t beamer -s presproy.md -o prespoy.pdf

I have to try it like 10 times or more until I get the pdf.

El domingo, 16 de mayo de 2021 a las 9:19:35 UTC-5, philipp.ku...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org 
escribió:

> I'm afraid I don't know the cause or solution of this problem, but I do 
> encounter the same error from time to time when trying to create beamer 
> slides with pandoc from markdown (using XeTeX).
> Two things might be of interest: First, iirc, the problem first occurred 
> after one of the latest macOS updates (I think it was the update to 11.3 
> and not 11.3.1, but I'm not entirely sure). Second, the problem only occurs 
> from time to time. Most of the time, building the slides works fine. Even 
> if it occurs, a second run directly afterwards normally succeeds.
> Unfortunately, I wasn't able to reproduce the problem up to now.
>
> BP schrieb am Freitag, 7. Mai 2021 um 19:34:21 UTC+2:
>
>> Is --pdf-engine=xelatex helpful?
>>
>> The LaTeX runs will take longer though.
>>
>> Den fre 7 maj 2021 01:22John MacFarlane <j...-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> skrev:
>>
>>>
>>> You're converting to PDF, I gather. Do any conversions to other
>>> formats cause problems? If it is just PDF, the problem is likely
>>> due to the step where pandoc runs pdflatex on an intermediate
>>> tex file.  That is also suggested by the error message
>>> itself.  But I'm mystified as to what the problem is, exactly.
>>> ANd I don't have an M1 mac to test on.  Can anyone else reproduce
>>> this?
>>>
>>> "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'm completely out of my depth here; does this seem to suggest the 
>>> files 
>>> > are quirky or is it a pandoc issue (which I could more usefully 
>>> report)?
>>> >
>>> > Running an M1 Mac Mini on 11.3 and just reinstalled pandoc (March 20, 
>>> > 2021 is the user guide date).
>>> >
>>> > Thanks for any suggestions.
>>> >
>>> > Cheers,
>>> >
>>> > Jason
>>> >
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>>>
>>

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