title: Rcmdr error when loading in OSX Yosemite
body: <p>I'm trying do load Rcmdr and keep getting an error message. </p>
  
  <p>I'm using Rstudio Version 0.98.1091 on a OSX Yosemite operating system. </p>
  
  <p>I have done the following: </p>
  
  <pre><code>    install.packages("Rcmdr")
      trying URL'http://cran.rstudio.com/bin/macosx/mavericks/contrib/3.1/Rcmdr_2.1-5.tgz'
      Content type 'application/x-gzip' length 5342987 bytes (5.1 Mb)
      opened URL
      ==================================================
      downloaded 5.1 Mb
  </code></pre>
  
  <p>However, when I try to load it, I get the following error: </p>
  
  <pre><code>    &gt; library(Rcmdr)
      Loading required package: splines
      Loading required package: RcmdrMisc
      Loading required package: car
      Loading required package: sandwich
      Error : .onLoad failed in loadNamespace() for 'Rcmdr', details:
      call: structure(.External(.C_dotTclObjv, objv), class = "tclObj")
      error: [tcl] invalid command name "tk_messageBox".
      In addition: Warning message:
      In fun(libname, pkgname) : couldn't connect to display ":0"
      Error: package or namespace load failed for ‘Rcmdr’
  </code></pre>
  
  <p>I have already installed X11 and it still doesn't work. </p>