diff --git a/favicon.icns b/favicon.icns
new file mode 100644
index 0000000..a6b15ec
Binary files /dev/null and b/favicon.icns differ
diff --git a/fluentdna.spec b/fluentdna.spec
index 58b5df4..e166131 100644
--- a/fluentdna.spec
+++ b/fluentdna.spec
@@ -1,35 +1,49 @@
 # -*- mode: python -*-
+from PyInstaller.compat import is_darwin
 
 block_cipher = None
+pathextras=['D:\\josiah\\Projects\\DDV']
+mainexepath=['DDV\\fluentdna.py']
+excludelibs=[]
+if is_darwin: pathextras=[] 
+if is_darwin: excludelibs=['FixTk', 'tcl', 'tk', '_tkinter', 'tkinter', 'Tkinter']
+if is_darwin: mainexepath=['DDV/fluentdna.py']
 
-# Icons: https://stackoverflow.com/questions/9946760/add-image-to-spec-file-in-pyinstaller
-a = Analysis(['DDV\\fluentdna.py'],
-             pathex=['D:\\josiah\\Projects\\DDV'],
-             binaries=[],
-             datas=[('DDV/example_data', 'DDV/example_data'),
-             ('DDV/html_template','DDV/html_template')],
-             hiddenimports=[],
-             hookspath=[],
-             runtime_hooks=[],
-             excludes=[],
-             win_no_prefer_redirects=False,
-             win_private_assemblies=False,
-             cipher=block_cipher)
+a = Analysis(mainexepath,
+   pathex=pathextras,
+   binaries=[],
+   datas=[('DDV/example_data', 'DDV/example_data'),
+   ('DDV/html_template','DDV/html_template')],
+   hiddenimports=[],
+   hookspath=[],
+   runtime_hooks=[],
+   excludes=excludelibs,
+   win_no_prefer_redirects=False,
+   win_private_assemblies=False,
+   cipher=block_cipher)
+             
 pyz = PYZ(a.pure, a.zipped_data,
              cipher=block_cipher)
 exe = EXE(pyz,
-          a.scripts,
-          exclude_binaries=True,
-          name='FluentDNA',
-          debug=False,
-          strip=False,
-          upx=True,
-          console=True,
-          icon='D:\\josiah\\Projects\\DDV\\favicon.ico')
+   a.scripts,
+   exclude_binaries=True,
+   name='FluentDNA',
+   debug=False,
+   strip=False,
+   upx=True,
+   console=True,
+   icon='favicon.ico')
+
 coll = COLLECT(exe,
-               a.binaries,
-               a.zipfiles,
-               a.datas,
-               strip=False,
-               upx=True,
-               name='FluentDNA')
+   a.binaries,
+   a.zipfiles,
+   a.datas,
+   strip=False,
+   upx=True,
+   name='FluentDNA')
+   
+#the app will be useful ONLY for the MAC GUI/windowed version
+#if is_darwin:
+#   app = BUNDLE(exe,
+#                name='FluentDNA.app',
+#                icon='favicon.icns')