diff --git a/src-tauri/src/bin/donut_daemon.rs b/src-tauri/src/bin/donut_daemon.rs
index ea30d4c..254b0dd 100644
--- a/src-tauri/src/bin/donut_daemon.rs
+++ b/src-tauri/src/bin/donut_daemon.rs
@@ -26,7 +26,6 @@ static SHOULD_QUIT: AtomicBool = AtomicBool::new(false);
 
 #[cfg(windows)]
 fn win_process_exists(pid: u32) -> bool {
-  use std::ptr;
   const PROCESS_QUERY_LIMITED_INFORMATION: u32 = 0x1000;
 
   extern "system" {
@@ -35,7 +34,7 @@ fn win_process_exists(pid: u32) -> bool {
   }
 
   let handle = unsafe { OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, 0, pid) };
-  if handle.is_null() || handle == ptr::null_mut() {
+  if handle.is_null() {
     false
   } else {
     unsafe { CloseHandle(handle) };
diff --git a/src-tauri/src/daemon/tray.rs b/src-tauri/src/daemon/tray.rs
index d402c41..d584811 100644
--- a/src-tauri/src/daemon/tray.rs
+++ b/src-tauri/src/daemon/tray.rs
@@ -80,10 +80,14 @@ pub fn open_gui() {
   // Using `-n` would bypass the single-instance plugin entirely.
   #[cfg(target_os = "macos")]
   {
+    // Use `open -n` to force launching a new process. Without `-n`, macOS
+    // re-activates the daemon (the existing process from the bundle) instead
+    // of launching the GUI binary. The single-instance Tauri plugin in the
+    // GUI handles deduplication if a GUI instance is already running.
     if let Some(app_bundle) = get_app_bundle_path() {
-      let _ = Command::new("open").arg(&app_bundle).spawn();
+      let _ = Command::new("open").args(["-n"]).arg(&app_bundle).spawn();
     } else {
-      let _ = Command::new("open").arg("-a").arg("Donut").spawn();
+      let _ = Command::new("open").args(["-n", "-a", "Donut"]).spawn();
     }
   }
 
diff --git a/src-tauri/src/daemon_spawn.rs b/src-tauri/src/daemon_spawn.rs
index e55bc7e..1abfdcd 100644
--- a/src-tauri/src/daemon_spawn.rs
+++ b/src-tauri/src/daemon_spawn.rs
@@ -13,7 +13,6 @@ use crate::daemon::autostart;
 /// This avoids spawning tasklist.exe which causes a visible conhost window flash.
 #[cfg(windows)]
 fn win_process_exists(pid: u32) -> bool {
-  use std::ptr;
   const PROCESS_QUERY_LIMITED_INFORMATION: u32 = 0x1000;
 
   extern "system" {
@@ -22,7 +21,7 @@ fn win_process_exists(pid: u32) -> bool {
   }
 
   let handle = unsafe { OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, 0, pid) };
-  if handle.is_null() || handle == ptr::null_mut() {
+  if handle.is_null() {
     false
   } else {
     unsafe { CloseHandle(handle) };