Here&#x27;s how to get started with Cleven on OS X:<p><pre><code>  brew install rlwrap
  brew install sdl2
  brew install sbcl
  wget https:&#x2F;&#x2F;beta.quicklisp.org&#x2F;quicklisp.lisp
  shasum -a 256 quicklisp.lisp  # c.f. https:&#x2F;&#x2F;www.quicklisp.org&#x2F;beta&#x2F;
  sbcl
</code></pre>
Within SBCL, run the following:<p><pre><code>  (load &quot;quicklisp.lisp&quot;)
  (quicklisp-quickstart:install)
  (ql:add-to-init-file)
</code></pre>
Press enter.  Exit SBCL by running:<p><pre><code>  (exit)
</code></pre>
Then run<p><pre><code>  cd ~&#x2F;quicklisp&#x2F;local-projects&#x2F;
  git clone https:&#x2F;&#x2F;github.com&#x2F;afainer&#x2F;cleven.git
  cd cleven
  rlwrap sbcl
</code></pre>
Inside SBCL, run:<p><pre><code>  (ql:quickload &quot;sdl2&quot;)
  (ql:quickload &quot;cleven&quot;)
  (load &quot;sandbox.lisp&quot;)
  (in-package #:sandbox)
  (run-sandbox)
</code></pre>
It pops up a window!  But I ran into an error at this point:<p><pre><code>  debugger invoked on a SIMPLE-ERROR in thread
  #&lt;THREAD &quot;Render thread&quot; RUNNING {1006D70EF3}&gt;:
    Shader compilation failed.  The info log is:
  ERROR: 0:24: &#x27;&#x27; :  version &#x27;330&#x27; is not supported
</code></pre>
I tried switching computers, but I got the same error.  I&#x27;m running an AMD Radeon R9 M370X on Yosemite.<p>Unfortunately I&#x27;ll have to stop here, since I&#x27;m a bit pressed for time.  This project is way cool, so I&#x27;ll look into it more later.  If you have any ideas how to debug it further, please let me know here or by email.<p>Those steps might work for other people on OS X, though.  There&#x27;s probably some kind of driver issue on my end.  (Ah, the life of gamedev...)<p>Edit: Created issue <a href="https:&#x2F;&#x2F;github.com&#x2F;afainer&#x2F;cleven&#x2F;issues&#x2F;1" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;afainer&#x2F;cleven&#x2F;issues&#x2F;1</a>