Add initial pyobjc version for macOS

This is to help with issue #51.  Will not help in the case of python 2 or
older python 3 version < 3.6.

send2trash/plat_osx_pyobjc.py

@@ -0,0 +1,29 @@
+# Copyright 2017 Virgil Dupras
+
+# This software is licensed under the "BSD" License as described in the "LICENSE" file,
+# which should be included with this package. The terms are also available at
+# http://www.hardcoded.net/licenses/bsd_license
+
+from Foundation import NSFileManager, NSURL
+from .compat import text_type
+
+
+def check_op_result(op_result):
+    # First value will be false on failure
+    if not op_result[0]:
+        # Error is in third value, localized failure reason matchs ctypes version
+        raise OSError(op_result[2].localizedFailureReason())
+
+
+def send2trash(paths):
+    if not isinstance(paths, list):
+        paths = [paths]
+    paths = [
+        path.decode("utf-8") if not isinstance(path, text_type) else path
+        for path in paths
+    ]
+    for path in paths:
+        file_url = NSURL.fileURLWithPath_(path)
+        fm = NSFileManager.defaultManager()
+        op_result = fm.trashItemAtURL_resultingItemURL_error_(file_url, None, None)
+        check_op_result(op_result)