title: PyInstaller Script Not found Error
body: <p>I made a script for an app and it works perfectly, and now I'm trying to use PyInstaller to execute it into an .app. I'm running the latest mac os version. It seems like PyInstaller can't find my script but it's spelled correctly and it actually exists. This is what I get:</p>
  
  <pre><code>Air-Andrej:~ Andrey$ pyinstaller -F --onefile bb.py
  110 INFO: PyInstaller: 3.2
  110 INFO: Python: 3.5.1
  122 INFO: Platform: Darwin-15.6.0-x86_64-i386-64bit
  124 INFO: wrote /Users/Andrey/bb.spec
  127 INFO: UPX is not available.
  Traceback (most recent call last):
    File "/Library/Frameworks/Python.framework/Versions/3.5/bin/pyinstaller", line 11, in &lt;module&gt;
      sys.exit(run())
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/PyInstaller/__main__.py", line 90, in run
      run_build(pyi_config, spec_file, **vars(args))
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/PyInstaller/__main__.py", line 46, in run_build
      PyInstaller.building.build_main.main(pyi_config, spec_file, **kwargs)
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/PyInstaller/building/build_main.py", line 788, in main
      build(specfile, kw.get('distpath'), kw.get('workpath'), kw.get('clean_build'))
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/PyInstaller/building/build_main.py", line 734, in build
      exec(text, spec_namespace)
    File "&lt;string&gt;", line 16, in &lt;module&gt;
    File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/PyInstaller/building/build_main.py", line 162, in __init__
      raise ValueError("script '%s' not found" % script)
  ValueError: script '/Users/Andrey/bb.py' not found
  </code></pre>