Error(s) in re-building vignettes:
--- re-building ‘lidR-LAS-class.Rmd’ using rmarkdown
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'lidR-LAS-class.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘lidR-LAS-class.Rmd’

--- re-building ‘lidR-LAScatalog-class.Rmd’ using rmarkdown
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'lidR-LAScatalog-class.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘lidR-LAScatalog-class.Rmd’

--- re-building ‘lidR-catalog-apply-examples.Rmd’ using rmarkdown
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'lidR-catalog-apply-examples.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘lidR-catalog-apply-examples.Rmd’

--- re-building ‘lidR-computation-speed-LAScatalog.Rmd’ using rmarkdown
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'lidR-computation-speed-LAScatalog.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘lidR-computation-speed-LAScatalog.Rmd’

SUMMARY: processing the following files failed:
  ‘lidR-LAS-class.Rmd’ ‘lidR-LAScatalog-class.Rmd’
  ‘lidR-catalog-apply-examples.Rmd’
  ‘lidR-computation-speed-LAScatalog.Rmd’

Error: Vignette re-building failed.
Execution halted