diff --git a/DynamicIsland/DynamicIslandApp.swift b/DynamicIsland/DynamicIslandApp.swift
index e23cd9c..dbac59e 100644
--- a/DynamicIsland/DynamicIslandApp.swift
+++ b/DynamicIsland/DynamicIslandApp.swift
@@ -369,10 +369,13 @@ class AppDelegate: NSObject, NSApplicationDelegate {
 
     private func resizeWindow(_ window: NSWindow, on screen: NSScreen, to size: CGSize, animated: Bool) {
         let screenFrame = screen.frame
+        // Clamp width to screen width so the notch never extends beyond screen edges on scaled displays
+        let clampedWidth = min(size.width, screenFrame.width)
+        let clampedHeight = min(size.height, screenFrame.height)
         let centerX = screenFrame.midX
-        let newX = centerX - (size.width / 2)
-        let newY = screenFrame.origin.y + screenFrame.height - size.height
-        let targetFrame = NSRect(x: newX, y: newY, width: size.width, height: size.height)
+        let newX = centerX - (clampedWidth / 2)
+        let newY = screenFrame.origin.y + screenFrame.height - clampedHeight
+        let targetFrame = NSRect(x: newX, y: newY, width: clampedWidth, height: clampedHeight)
 
         window.setFrame(targetFrame, display: true)
     }
diff --git a/DynamicIsland/components/Notch/DynamicIslandHeader.swift b/DynamicIsland/components/Notch/DynamicIslandHeader.swift
index 860ce23..34e4610 100644
--- a/DynamicIsland/components/Notch/DynamicIslandHeader.swift
+++ b/DynamicIsland/components/Notch/DynamicIslandHeader.swift
@@ -53,10 +53,11 @@ struct DynamicIslandHeader: View {
             }
 
             if vm.notchState == .open && !Defaults[.enableMinimalisticUI] {
+                let spacerWidth = min(vm.closedNotchSize.width, 300)
                 Rectangle()
                     .fill(NSScreen.screens
                         .first(where: { $0.localizedName == coordinator.selectedScreen })?.safeAreaInsets.top ?? 0 > 0 ? .black : .clear)
-                    .frame(width: vm.closedNotchSize.width)
+                    .frame(width: spacerWidth)
                     .mask {
                         NotchShape()
                     }
diff --git a/DynamicIsland/components/Notch/NotchHomeView.swift b/DynamicIsland/components/Notch/NotchHomeView.swift
index f8603a6..7de0d23 100644
--- a/DynamicIsland/components/Notch/NotchHomeView.swift
+++ b/DynamicIsland/components/Notch/NotchHomeView.swift
@@ -32,7 +32,8 @@ struct MusicPlayerView: View {
 
     var body: some View {
         HStack(alignment: .top, spacing: 12) {
-            AlbumArtView(vm: vm, albumArtNamespace: albumArtNamespace).padding(.all, 5)
+            AlbumArtView(vm: vm, albumArtNamespace: albumArtNamespace)
+                .padding(.all, 5)
             MusicControlsView()
                 .frame(maxWidth: .infinity, alignment: .leading)
                 .drawingGroup()
diff --git a/DynamicIsland/components/Settings/SettingsView.swift b/DynamicIsland/components/Settings/SettingsView.swift
index eceac92..9bd3df3 100644
--- a/DynamicIsland/components/Settings/SettingsView.swift
+++ b/DynamicIsland/components/Settings/SettingsView.swift
@@ -3469,7 +3469,9 @@ struct Appearance: View {
     @State private var speed: CGFloat = 1.0
 
     private var notchWidthRange: ClosedRange<Double> {
-        Double(currentRecommendedMinimumNotchWidth())...900
+        let minW = Double(currentRecommendedMinimumNotchWidth())
+        let maxW = min(900, Double(maxAllowedNotchWidth()))
+        return minW...max(minW, maxW)
     }
     private var defaultOpenNotchWidth: CGFloat {
         currentRecommendedMinimumNotchWidth()
diff --git a/DynamicIsland/sizing/matters.swift b/DynamicIsland/sizing/matters.swift
index d972b3d..b9418b2 100644
--- a/DynamicIsland/sizing/matters.swift
+++ b/DynamicIsland/sizing/matters.swift
@@ -30,10 +30,31 @@ let batterySneakSize: CGSize = .init(width: 160, height: 1)
 var openNotchSize: CGSize {
     let storedWidth = Defaults[.openNotchWidth]
     let minWidth = currentRecommendedMinimumNotchWidth()
-    let width = max(storedWidth, minWidth)
+    let maxWidth = maxAllowedNotchWidth()
+    let width = min(max(storedWidth, minWidth), maxWidth)
     return .init(width: width, height: 200)
 }
 
+/// Maximum notch width based on the current screen's point width.
+/// Prevents the notch from extending beyond the screen on scaled displays.
+func maxAllowedNotchWidth(for screenName: String? = nil) -> CGFloat {
+    let screen: NSScreen?
+    if let screenName {
+        screen = NSScreen.screens.first { $0.localizedName == screenName }
+    } else {
+        screen = NSScreen.main
+    }
+    guard let screenWidth = screen?.frame.width, screenWidth > 0 else {
+        return 900
+    }
+    return max(screenWidth - 60, 400)
+}
+
+/// Convenience for the main screen.
+func maxAllowedNotchWidth() -> CGFloat {
+    maxAllowedNotchWidth(for: nil)
+}
+
 // MARK: - Tab-Based Notch Width
 
 /// Counts the number of currently enabled standard notch tabs.
@@ -87,12 +108,17 @@ func currentRecommendedMinimumNotchWidth() -> CGFloat {
 }
 
 /// Enforces the minimum notch width based on current tab count.
+/// Also clamps to screen width so the notch never exceeds the display.
 /// Only adjusts when not in minimalistic mode.
 func enforceMinimumNotchWidth() {
     guard !Defaults[.enableMinimalisticUI] else { return }
     let minWidth = currentRecommendedMinimumNotchWidth()
-    if Defaults[.openNotchWidth] < minWidth {
-        Defaults[.openNotchWidth] = minWidth
+    let maxWidth = maxAllowedNotchWidth()
+    var width = Defaults[.openNotchWidth]
+    if width < minWidth { width = minWidth }
+    if width > maxWidth { width = maxWidth }
+    if Defaults[.openNotchWidth] != width {
+        Defaults[.openNotchWidth] = width
     }
 }
 private let minimalisticBaseOpenNotchSize: CGSize = .init(width: 420, height: 180)