title: TclTk library issue while install Rcmdr package on MacBookPro
body: <p>I get the following ERROR while trying to load Rcmdr for R on my MacBook Pro:</p>
  
  <pre><code>&gt; library("Rcmdr")
  Error : .onLoad failed in loadNamespace() for 'tcltk', details:
    call: dyn.load(file, DLLpath = DLLpath, ...)
    error: unable to load shared object '/Library/Frameworks/R.framework/Versions/3.0/Resources/library/tcltk/libs/tcltk.so':
    dlopen(/Library/Frameworks/R.framework/Versions/3.0/Resources/library/tcltk/libs/tcltk.so, 10): Library not loaded: /usr/local/lib/libtcl8.6.dylib
    Referenced from: /Library/Frameworks/R.framework/Versions/3.0/Resources/library/tcltk/libs/tcltk.so
    Reason: image not found
  Error: package or namespace load failed for ‘Rcmdr’
  </code></pre>
  
  <p>I have other problem on this machine related to the TclTk libraries, but I didn't get any help when I posted about troubles installing <a href="https://stackoverflow.com/questions/17727619/tclstub-issue-while-using-homebrew-to-install-graphviz">graphviz</a>.</p>
  
  <p>If someone could help me fix the TclTk library issue I would really appreciate it.</p>
  
  <p>Thanks in advance.</p>