diff --git a/README.rst b/README.rst
index dda00e5..d0245db 100644
--- a/README.rst
+++ b/README.rst
@@ -4,28 +4,39 @@ LESS PLUGIN FOR SUBLIME TEXT
 This plugin compiles LESS (http://lesscss.org/) files into CSS files in Sublime
 Text 2 on save.
 
-This plugin is tested on Linux only.
-
-If you are using Mac OS X or Windows have a look at
-https://github.com/BBB/sublime-text-2-plugins.
-
+This plugin is tested on Mac Os X, but suppose to work on other systems.
 
 Prerequisits
 ------------
 
-Install lessc
+Install nodejs, required for runing lessc:
 
-  $ apt-get install lessc
+  http://www.hodejs.org
 
-or
+Install lessc binary:
 
-  $ apt-get install nodejs npm
-  $ npm install lessc
+  http://lesscss.org/
 
 
-Installation
+Package installation
 ------------
 
+Linux
+
   $ cd ~/.config/sublime-text-2/Packages/
-  $ git clone git@github.com:tisto/sublime-text-less.git
 
+Mac Os X
+
+  $ cd ~/Library/Application\ Support/Sublime\ Text\ 2/Packages
+
+  $ git clone git@github.com:speechkey/sublime-text-less.git
+
+Edit sublime-text-less.sublime-settings and add lessc and nodejs path, if it not already included in your default environment path.
+
+Linux
+
+  $ vim ~/.config/sublime-text-2/Packages/sublime-text-less.sublime-settings
+
+Mac Os X
+
+  $ vim ~/Library/Application\ Support/Sublime\ Text\ 2/Packages/sublime-text-less.sublime-settings   
diff --git a/commandline.py b/commandline.py
new file mode 100644
index 0000000..982a332
--- /dev/null
+++ b/commandline.py
@@ -0,0 +1,41 @@
+# adapted from https://github.com/wbond/sublime_package_control/blob/master/Package%20Control.py
+import os.path
+import subprocess
+import sublime
+
+
+class BinaryNotFoundError(Exception):
+    pass
+
+
+def find_binary(name):
+    dirs = ['/usr/local/sbin', '/usr/local/bin', '/usr/sbin', '/usr/bin',
+        '/sbin', '/bin']
+
+    s = sublime.load_settings("sublime-text-less.sublime-settings")
+    lessc_path = s.get("lessc_path")
+    nodejs_path = s.get("nodejs_path")
+
+    if lessc_path:
+        dirs.append(lessc_path)
+
+    if nodejs_path:
+        os.environ["PATH"] += ''.join([':', nodejs_path])
+
+    for dir in dirs:
+        path = os.path.join(dir, name)
+        if os.path.exists(path):
+            return path
+
+    raise BinaryNotFoundError('The binary ' + name + ' could not be ' + \
+        'located')
+
+
+def execute(args):
+    proc = subprocess.Popen(args, stdin=subprocess.PIPE,
+        stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+
+    output = proc.stdout.read()
+    proc.wait()
+    return output
+
diff --git a/less.py b/less.py
index 0c85bd6..b33f91f 100755
--- a/less.py
+++ b/less.py
@@ -1,23 +1,28 @@
 import sublime
 import sublime_plugin
 import subprocess
+import commandline
 
 
 class CompileLessOnSave(sublime_plugin.EventListener):
 
     def on_post_save(self, view):
+        try:
+            lessc = commandline.find_binary('lessc')
+        except commandline.BinaryNotFoundError:
+            sublime.error_message("I couldn't find \"less\" binary on your system. Less is required on your system. Please install it and try again.")
+            return
+
         if not view.file_name().endswith('.less'):
             return
 
         filename = view.file_name()
         output_filename = filename.replace('.less', '.css')
 
-        proc = subprocess.Popen("lessc %s" % filename,
-            shell=True,
-            stdout=subprocess.PIPE)
-        output = proc.communicate()[0]
+        command = [lessc] + [filename]
+        output = commandline.execute(command)
 
-	output_file = open(output_filename,"w")
-	output_file.write(output)
-	output_file.close()
+        output_file = open(output_filename,"w")
+        output_file.write(output)
+        output_file.close()
 
diff --git a/sublime-text-less.sublime-settings b/sublime-text-less.sublime-settings
new file mode 100644
index 0000000..45bfdbe
--- /dev/null
+++ b/sublime-text-less.sublime-settings
@@ -0,0 +1,4 @@
+{
+	"lessc_path": "/Users/speechkey/Dev/tools/bin",
+	"nodejs_path": "/opt/local/bin"
+}