diff --git a/MTMR.xcodeproj/project.pbxproj b/MTMR.xcodeproj/project.pbxproj
index edea1c7..22199f7 100644
--- a/MTMR.xcodeproj/project.pbxproj
+++ b/MTMR.xcodeproj/project.pbxproj
@@ -412,7 +412,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
+				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
@@ -465,7 +465,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.13;
+				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = macosx;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
diff --git a/MTMR/AppDelegate.swift b/MTMR/AppDelegate.swift
index ab5d0cf..c3a2934 100644
--- a/MTMR/AppDelegate.swift
+++ b/MTMR/AppDelegate.swift
@@ -11,10 +11,12 @@ import Cocoa
 @NSApplicationMain
 class AppDelegate: NSObject, NSApplicationDelegate {
 
-
-
     func applicationDidFinishLaunching(_ aNotification: Notification) {
-        TouchBarController.shared.setupControlStripPresence()
+        if #available(OSX 10.12.2, *) {
+            TouchBarController.shared.setupControlStripPresence()
+        } else {
+            // Fallback on earlier versions
+        }
         // Insert code here to initialize your application
     }
 
diff --git a/MTMR/AppleScriptTouchBarItem.swift b/MTMR/AppleScriptTouchBarItem.swift
index 7e10d53..87c4dc7 100644
--- a/MTMR/AppleScriptTouchBarItem.swift
+++ b/MTMR/AppleScriptTouchBarItem.swift
@@ -1,5 +1,6 @@
 import Foundation
 
+@available(OSX 10.12.2, *)
 class AppleScriptTouchBarItem: NSCustomTouchBarItem {
     let script: NSAppleScript
     private var timer: Timer!
diff --git a/MTMR/TimeTouchBarItem.swift b/MTMR/TimeTouchBarItem.swift
index 045db1c..e409eba 100644
--- a/MTMR/TimeTouchBarItem.swift
+++ b/MTMR/TimeTouchBarItem.swift
@@ -1,5 +1,6 @@
 import Cocoa
 
+@available(OSX 10.12.2, *)
 class TimeTouchBarItem: NSCustomTouchBarItem {
     private let dateFormatter = DateFormatter()
     private var timer: Timer!
diff --git a/MTMR/TouchBarController.swift b/MTMR/TouchBarController.swift
index 34868ee..25622c0 100644
--- a/MTMR/TouchBarController.swift
+++ b/MTMR/TouchBarController.swift
@@ -8,6 +8,7 @@
 
 import Cocoa
 
+@available(OSX 10.12.2, *)
 class TouchBarController: NSObject, NSTouchBarDelegate {
 
     static let shared = TouchBarController()
@@ -101,6 +102,7 @@ class TouchBarController: NSObject, NSTouchBarDelegate {
 
 }
 
+@available(OSX 10.12.2, *)
 extension CustomButtonTouchBarItem {
     convenience init(identifier: NSTouchBarItem.Identifier, title: String, HIDKeycode: Int) {
         self.init(identifier: identifier, title: title) { _ in
diff --git a/MTMR/TouchBarItems.swift b/MTMR/TouchBarItems.swift
index af2ffcd..d74c5e6 100644
--- a/MTMR/TouchBarItems.swift
+++ b/MTMR/TouchBarItems.swift
@@ -8,6 +8,7 @@
 
 import Cocoa
 
+@available(OSX 10.12.2, *)
 extension NSTouchBarItem.Identifier {
     static let escButton = NSTouchBarItem.Identifier("com.toxblh.mtmr.escButton")
     static let dismissButton = NSTouchBarItem.Identifier("com.toxblh.mtmr.dismissButton")
@@ -35,6 +36,7 @@ extension NSTouchBarItem.Identifier {
     static let controlStripItem = NSTouchBarItem.Identifier("com.toxblh.mtmr.controlStrip")
 }
 
+@available(OSX 10.12.2, *)
 class CustomButtonTouchBarItem: NSCustomTouchBarItem {
     let tapClosure: (NSCustomTouchBarItem) -> ()