I am new to Unix and FreeSurfer, and I am having some trouble installing FreeSurfer on my Macbook Air (10.8). I&#39;ve downloaded the .dmg file just fine, and when I start the installation steps, I&#39;m instructed to add some lines to my .cshrc or .tcshrc files in my home directory. Can anyone point me to this file? Also, just below on the installation dialog, it says for sh or bash users:<br>

<br><pre>export FREESURFER_HOME=&lt;freesurfer_installation_directory&gt;/freesurfer
source $FREESURFER_HOME/SetUpFreeSurfer.sh</pre><br>Can I use these instead of the first two lines of code? I tried to enter these bash lines one at a time into my terminal window. The first one (&quot;export&quot;) did not give me any errors but for the &quot;source&quot; one, I received the message:<br>

<br>bash: /freesurfer/SetUpFreeSurfer.sh: No such file or directory. <br><br>Any idea as to why I am getting this error? My apologies in advance for my lack of experience.<br><br>Many thanks,<br>Nate<br><br>