diff --git a/nixcfgs/users/js0ny/programs/darwin/alt-tab.nix b/nixcfgs/users/js0ny/programs/darwin/alt-tab.nix
new file mode 100644
index 0000000..b0fa096
--- /dev/null
+++ b/nixcfgs/users/js0ny/programs/darwin/alt-tab.nix
@@ -0,0 +1,76 @@
+# brew install alt-tab
+{...}: let
+  hideList = [
+    "com.apple.finder"
+    "com.apple.Preview"
+  ];
+  ignoreList = [
+    "com.microsoft.rdc.macos"
+    "com.teamviewer.TeamViewer"
+    "org.virtualbox.app.VirtualBoxVM"
+    "com.parallels."
+    "com.citrix.XenAppViewer"
+    "com.citrix.receiver.icaviewer.mac"
+    "com.nicesoftware.dcvviewer"
+    "com.apple.ScreenSharing"
+  ];
+  mkHideApps = identifier: {
+    "hide" = "2";
+    "bundleIdentifier" = identifier;
+    "ignore" = "0";
+  };
+  mkIgnoreApps = identifier: {
+    "bundleIdentifier" = identifier;
+    "hide" = "0";
+    "ignore" = "2";
+  };
+  blocklist = builtins.toJSON (map mkHideApps hideList ++ map mkIgnoreApps ignoreList);
+in {
+  targets.darwin.defaults = {
+    "com.lwouis.alt-tab-macos" = {
+      # 0: Small
+      # 1: Medium
+      # 2: Large
+      appearanceSize = 1;
+      # 0: Thumbnails (Recording permission required)
+      # 1: App Icons
+      # 2: Titles
+      appearanceStyle = 0;
+      # 0: Normal
+      # 1: High
+      # 2: Highest
+      appearanceVisibility = 2;
+      # 0: Light
+      # 1: Dark
+      # 2: System
+      appearanceTheme = 2;
+
+      # Shortcut 1: Cmd-Tab - Mimic Alt-Tab in Windows
+      # U+2318
+      holdShortcut = "⌘";
+      # U+21e5
+      nextWindowShortcut = "⇥";
+      # TODO: Shortcut 2:
+      holdShortcut2 = "⌘";
+
+      previewFocusedWindow = true;
+      showTabsAsWindows = false;
+      hideAppBadges = false;
+      # 0: Leading
+      # 1: Center
+      alignThumbnails = 1;
+      menubarIcon = 0;
+      menubarIconShown = false;
+      # 0: Don't check for update
+      # 1: Check for update
+      # 2: Auto Update
+      updatePolicy = 0;
+      # 0: Never send crash report
+      # 1: Ask
+      # 2: Always send
+      crashPolicy = 0;
+      vimKeysEnabled = true;
+      blacklist = toString blocklist;
+    };
+  };
+}
diff --git a/nixcfgs/users/js0ny/programs/duti.nix b/nixcfgs/users/js0ny/programs/darwin/duti.nix
similarity index 100%
rename from nixcfgs/users/js0ny/programs/duti.nix
rename to nixcfgs/users/js0ny/programs/darwin/duti.nix
diff --git a/nixcfgs/users/js0ny/zen.nix b/nixcfgs/users/js0ny/zen.nix
index e9b782b..119af80 100644
--- a/nixcfgs/users/js0ny/zen.nix
+++ b/nixcfgs/users/js0ny/zen.nix
@@ -33,7 +33,8 @@
     ./programs/anki.nix
     ./programs/sioyek.nix
     # ./programs/retroarch.nix # Package broken on macOS
-    ./programs/duti.nix
+    ./programs/darwin/duti.nix
+    ./programs/darwin/alt-tab.nix
 
     ../../modules/home/do-not-track.nix
     ../../modules/home/darwin.nix