diff --git a/setup.cfg b/setup.cfg
index 55c67a31..f33499d7 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -38,7 +38,7 @@ install_requires =
   keyring
   apscheduler
   sentry-sdk
-  pyobjc-framework-Cocoa
+  pyobjc-framework-Cocoa; sys_platform == 'darwin'
 tests_require =
   pytest
   pytest-qt
diff --git a/src/vorta/notifications.py b/src/vorta/notifications.py
index ee899174..4b3a411f 100644
--- a/src/vorta/notifications.py
+++ b/src/vorta/notifications.py
@@ -25,7 +25,8 @@ class DarwinNotifications(VortaNotifications):
         notification.setTitle_(title)
         notification.setInformativeText_(text)
         center = NSUserNotificationCenter.defaultUserNotificationCenter()
-        center.deliverNotification_(notification)
+        if center is not None:  # Only works when run from app bundle.
+            center.deliverNotification_(notification)
 
 
 class LinuxNotifications(VortaNotifications):