title: Can't use more than 2 cores with microsoft R Open
body: <p>I recently installed Microsoft R Open but this message appears at startup of R:</p>
  
  <p>"Multithreaded BLAS/LAPACK libraries detected. Using 2 cores for math algorithms."</p>
  
  <p>on a MAC it's supposed to start using the 4 cores without any additional set up. </p>
  
  <p>How can i change this to 3 or 4 cores? </p>
  
  <p>Thank you </p>