I'm having an issue installing Flextable, and it seems to be because of the gdtools package. It looks like gdtools relies on a .dylib file? Any ideas?
> install.packages("flextable")
  There is a binary version available but the source version is later:
          binary source needs_compilation
flextable  0.4.0  0.4.2             FALSE
installing the source package ‘flextable’
trying URL 'https://cran.rstudio.com/src/contrib/flextable_0.4.2.tar.gz'
Content type 'application/x-gzip' length 135276 bytes (132 KB)
==================================================
downloaded 132 KB
Warning in strptime(xx, f <- "%Y-%m-%d %H:%M:%OS", tz = tz) :
  unknown timezone 'default/Australia/Melbourne'
* installing *source* package ‘flextable’ ...
** package ‘flextable’ successfully unpacked and MD5 sums checked
** R
** inst
** preparing package for lazy loading
Error in dyn.load(file, DLLpath = DLLpath, ...) : 
  unable to load shared object '/Library/Frameworks/R.framework/Versions/3.4/Resources/library/gdtools/libs/gdtools.so':
  dlopen(/Library/Frameworks/R.framework/Versions/3.4/Resources/library/gdtools/libs/gdtools.so, 6): Library not loaded: /opt/X11/lib/libcairo.2.dylib
  Referenced from: /Library/Frameworks/R.framework/Versions/3.4/Resources/library/gdtools/libs/gdtools.so
  Reason: image not found
ERROR: lazy loading failed for package ‘flextable’
* removing ‘/Library/Frameworks/R.framework/Versions/3.4/Resources/library/flextable’
Warning in install.packages :
  installation of package ‘flextable’ had non-zero exit status
The downloaded source packages are in
    ‘/private/var/folders/fs/2zzbjym545vgl0hvq4pvs6sc0000gn/T/Rtmpdo3FMp/downloaded_packages’
 
     
     
     
    