diff --git a/src/forceful_timer/app_utils.py b/src/forceful_timer/app_utils.py
index b85fd8f..c1f019c 100644
--- a/src/forceful_timer/app_utils.py
+++ b/src/forceful_timer/app_utils.py
@@ -11,7 +11,11 @@ def is_app_running(app_id: str) -> bool:
         app_ids = [x.split()[0] for x in get_running_apps_raw()]
         return app_id in app_ids
     elif os_type() == "windows":
-        raise NotImplementedError
+        output = subprocess.check_output(["tasklist"]).decode()
+        return app_id in [line.split()[1] for line in output.split("\n")[3:-1]]
+    elif os_type() == "darwin":
+        output = subprocess.check_output(["ps", "-A"]).decode()
+        return app_id in [line.split()[0] for line in output.split("\n")[1:-1]]
     return False
 
 
@@ -24,7 +28,13 @@ def get_running_apps_raw() -> list:
         decoded_output = subprocess.check_output(["wmctrl", "-l"])
         output = decoded_output.decode().split("\n")[:-1]
     elif os_type() == "windows":
-        raise NotImplementedError
+        output = subprocess.check_output(["tasklist"]).decode()
+        output = output.split("\n")[3:-1]
+        output = [line.split()[0:2] for line in output]
+    elif os_type() == "darwin":
+        output = subprocess.check_output(["ps", "-A"]).decode()
+        output = output.split("\n")[1:-1]
+        output = [line.split()[0:2] for line in output]
     return output
 
 
@@ -48,8 +58,8 @@ def get_running_apps() -> list:
     """
     if os_type() == "linux":
         apps = [extract_app_data_values(x) for x in get_running_apps_raw()]
-    elif os_type() == "windows":
-        raise NotImplementedError
+    elif os_type() == "windows" or os_type() == "darwin":
+        apps = [tuple(x) for x in get_running_apps_raw()]
     return apps
 
 
diff --git a/src/forceful_timer/main.py b/src/forceful_timer/main.py
index 6fe840d..b1b6a22 100644
--- a/src/forceful_timer/main.py
+++ b/src/forceful_timer/main.py
@@ -59,6 +59,8 @@ def shutdown():
         subprocess.call(["shutdown", "now"])
     elif os_type() == "windows":
         subprocess.call(["shutdown", "/s", "/t", "0"])
+    elif os_type() == "darwin":
+        subprocess.call(["sudo", "shutdown", "-h", "now"])
 
 
 def cancel_shutdown(apps):
@@ -66,7 +68,14 @@ def cancel_shutdown(apps):
 
     for app in apps:
         if app_utils.is_app_running(app[0]):
-            subprocess.call(["wmctrl", "-i", "-c", app[0]])
+            if os_type() == "linux":
+                subprocess.call(["wmctrl", "-i", "-c", app[0]])
+            elif os_type() == "windows":
+                subprocess.call(["taskkill", "/F", "/IM", app[1]])
+            elif os_type() == "darwin":
+                subprocess.call(
+                    ["osascript", "-e", f"tell application {app[1]} to quit"]
+                )
             print("Terminating: {}".format(app))
         else:
             print("Skipping app, because it's not running anymore: {}".format(app))
diff --git a/src/forceful_timer/ui_utils.py b/src/forceful_timer/ui_utils.py
index 6b82338..19c786c 100644
--- a/src/forceful_timer/ui_utils.py
+++ b/src/forceful_timer/ui_utils.py
@@ -10,6 +10,8 @@ def clear_terminal():
         subprocess.run("clear", shell=True)
     elif os_type() == "windows":
         subprocess.run("cls", shell=True)
+    elif os_type() == "darwin":
+        subprocess.run("clear", shell=True)
 
 
 def get_title() -> list:
diff --git a/src/forceful_timer/utils.py b/src/forceful_timer/utils.py
index b976c40..ed1256f 100644
--- a/src/forceful_timer/utils.py
+++ b/src/forceful_timer/utils.py
@@ -2,7 +2,7 @@
 
 
 def check_os():
-    if os_type_str not in ["linux", "windows"]:
+    if os_type_str not in ["linux", "windows", "darwin"]:
         raise OSError("Your operating system is not supported!", os_type_str)