diff --git a/Interlace/lib/threader.py b/Interlace/lib/threader.py
index 1cfaaf8..3ab1d2d 100644
--- a/Interlace/lib/threader.py
+++ b/Interlace/lib/threader.py
@@ -4,7 +4,12 @@ from concurrent.futures import ThreadPoolExecutor
 from multiprocessing import Event
 from tqdm import tqdm
 
-shell = os.getenv("SHELL") if os.getenv("SHELL") else "/bin/sh"
+import platform
+
+if platform.system().lower() == 'linux':
+    shell = os.getenv("SHELL") if os.getenv("SHELL") else "/bin/sh"
+else:
+    shell = None
 
 class Task(object):
     def __init__(self, command):