diff --git a/.changes/set-theme-none-macos-crash.md b/.changes/set-theme-none-macos-crash.md
new file mode 100644
index 000000000..86c983123
--- /dev/null
+++ b/.changes/set-theme-none-macos-crash.md
@@ -0,0 +1,5 @@
+---
+"tao": patch
+---
+
+Fix setting theme to `None` crashes the app on macOS
diff --git a/src/platform_impl/macos/window.rs b/src/platform_impl/macos/window.rs
index 6ac3ab4c0..da57bb6ce 100644
--- a/src/platform_impl/macos/window.rs
+++ b/src/platform_impl/macos/window.rs
@@ -345,15 +345,15 @@ pub(super) fn set_ns_theme(theme: Option<Theme>) {
     let app: id = msg_send![app_class, sharedApplication];
     let has_theme: BOOL = msg_send![app, respondsToSelector: sel!(effectiveAppearance)];
     if has_theme == YES {
-      let name = if let Some(theme) = theme {
-        NSString::alloc(nil).init_str(match theme {
+      let appearance = if let Some(theme) = theme {
+        let name = NSString::alloc(nil).init_str(match theme {
           Theme::Dark => "NSAppearanceNameDarkAqua",
           Theme::Light => "NSAppearanceNameAqua",
-        })
+        });
+        msg_send![class!(NSAppearance), appearanceNamed: name]
       } else {
         nil
       };
-      let appearance: id = msg_send![class!(NSAppearance), appearanceNamed: name];
       let _: () = msg_send![app, setAppearance: appearance];
     }
   }