diff --git a/Kit/Widgets/BarChart.swift b/Kit/Widgets/BarChart.swift
index 0d3658a5..2d26c131 100644
--- a/Kit/Widgets/BarChart.swift
+++ b/Kit/Widgets/BarChart.swift
@@ -166,7 +166,7 @@ public class BarChart: WidgetWrapper {
             let partition = NSBezierPath(rect: NSRect(x: x, y: offset, width: partitionWidth, height: partitonHeight))
             
             switch self.colorState {
-            case .systemAccent: NSColor.controlAccentColor.set()
+            case .systemAccent: controlAccentColor.set()
             case .utilization: partitionValue.usageColor(zones: self.colorZones).setFill()
             case .pressure: self.pressureLevel.pressureColor().setFill()
             case .monochrome:
@@ -175,7 +175,7 @@ public class BarChart: WidgetWrapper {
                 } else {
                     (isDarkMode ? NSColor.white : NSColor.black).set()
                 }
-            default: (self.colorState.additional as? NSColor ?? NSColor.controlAccentColor).set()
+            default: (self.colorState.additional as? NSColor ?? controlAccentColor).set()
             }
             
             partition.fill()
diff --git a/Kit/Widgets/LineChart.swift b/Kit/Widgets/LineChart.swift
index 40cb7220..6b5ac7dc 100644
--- a/Kit/Widgets/LineChart.swift
+++ b/Kit/Widgets/LineChart.swift
@@ -107,9 +107,9 @@ public class LineChart: WidgetWrapper {
         let offset = lineWidth / 2
         var boxSize: CGSize = CGSize(width: self.width - (Constants.Widget.margin.x*2), height: self.frame.size.height)
         
-        var color: NSColor = NSColor.controlAccentColor
+        var color: NSColor = controlAccentColor
         switch self.colorState {
-        case .systemAccent: color = NSColor.controlAccentColor
+        case .systemAccent: color = controlAccentColor
         case .utilization: color = value.usageColor()
         case .pressure: color = self.pressureLevel.pressureColor()
         case .monochrome:
@@ -118,7 +118,7 @@ public class LineChart: WidgetWrapper {
             } else {
                 color = (isDarkMode ? NSColor.white : NSColor.black)
             }
-        default: color = self.colorState.additional as? NSColor ?? NSColor.controlAccentColor
+        default: color = self.colorState.additional as? NSColor ?? controlAccentColor
         }
         
         if self.labelState {
diff --git a/Kit/Widgets/Mini.swift b/Kit/Widgets/Mini.swift
index 5802ad89..bd570b14 100644
--- a/Kit/Widgets/Mini.swift
+++ b/Kit/Widgets/Mini.swift
@@ -118,13 +118,13 @@ public class Mini: WidgetWrapper {
             origin.y = 1
         }
         
-        var color: NSColor = NSColor.controlAccentColor
+        var color: NSColor = controlAccentColor
         switch self.colorState {
-        case .systemAccent: color = NSColor.controlAccentColor
+        case .systemAccent: color = controlAccentColor
         case .utilization: color = value.usageColor()
         case .pressure: color = self.pressureLevel.pressureColor()
         case .monochrome: color = (isDarkMode ? NSColor.white : NSColor.black)
-        default: color = self.colorState.additional as? NSColor ?? NSColor.controlAccentColor
+        default: color = self.colorState.additional as? NSColor ?? controlAccentColor
         }
         
         let stringAttributes = [
diff --git a/Kit/extensions.swift b/Kit/extensions.swift
index 33be806e..33e74691 100644
--- a/Kit/extensions.swift
+++ b/Kit/extensions.swift
@@ -102,7 +102,7 @@ public extension Int {
         case 3:
             return NSColor.systemRed
         default:
-            return NSColor.controlAccentColor
+            return controlAccentColor
         }
     }
 }
diff --git a/Kit/module/popup.swift b/Kit/module/popup.swift
index dad3b9b6..0c56f223 100644
--- a/Kit/module/popup.swift
+++ b/Kit/module/popup.swift
@@ -241,7 +241,9 @@ internal class HeaderView: NSStackView {
         activity.translatesAutoresizingMaskIntoConstraints = false
         activity.imageScaling = .scaleNone
         activity.image = Bundle(for: type(of: self)).image(forResource: "chart")!
-        activity.contentTintColor = .lightGray
+        if #available(OSX 10.14, *) {
+            activity.contentTintColor = .lightGray
+        }
         activity.isBordered = false
         activity.action = #selector(openActivityMonitor)
         activity.target = self
@@ -269,7 +271,9 @@ internal class HeaderView: NSStackView {
         settings.translatesAutoresizingMaskIntoConstraints = false
         settings.imageScaling = .scaleNone
         settings.image = Bundle(for: type(of: self)).image(forResource: "settings")!
-        settings.contentTintColor = .lightGray
+        if #available(OSX 10.14, *) {
+            settings.contentTintColor = .lightGray
+        }
         settings.isBordered = false
         settings.action = #selector(openSettings)
         settings.target = self
diff --git a/Kit/module/settings.swift b/Kit/module/settings.swift
index 1ceccb54..fa530182 100644
--- a/Kit/module/settings.swift
+++ b/Kit/module/settings.swift
@@ -371,7 +371,9 @@ internal class WidgetPreview: NSStackView {
             button.image = image
         }
         button.imageScaling = .scaleProportionallyDown
-        button.contentTintColor = .lightGray
+        if #available(OSX 10.14, *) {
+            button.contentTintColor = .lightGray
+        }
         button.isBordered = false
         button.action = #selector(self.toggleSettings)
         button.target = self
diff --git a/Kit/plugins/Charts.swift b/Kit/plugins/Charts.swift
index 0155b1e5..1d3c4e5e 100644
--- a/Kit/plugins/Charts.swift
+++ b/Kit/plugins/Charts.swift
@@ -36,7 +36,7 @@ public class LineChartView: NSView {
     public var points: [Double]
     public var transparent: Bool = true
     
-    public var color: NSColor = NSColor.controlAccentColor
+    public var color: NSColor = controlAccentColor
     
     public init(frame: NSRect, num: Int) {
         self.points = Array(repeating: 0, count: num)
diff --git a/Kit/types.swift b/Kit/types.swift
index 1fd58000..5bba6d46 100644
--- a/Kit/types.swift
+++ b/Kit/types.swift
@@ -157,6 +157,16 @@ extension Color: CaseIterable {
     }
 }
 
+public var controlAccentColor: NSColor {
+    get {
+        if #available(OSX 10.14, *) {
+            return NSColor.controlAccentColor
+        } else {
+            return NSColor.systemBlue
+        }
+    }
+}
+
 public typealias colorZones = (orange: Double, red: Double)
 
 public extension Notification.Name {
diff --git a/Modules/Disk/popup.swift b/Modules/Disk/popup.swift
index 11752a5c..4b2726f1 100644
--- a/Modules/Disk/popup.swift
+++ b/Modules/Disk/popup.swift
@@ -218,7 +218,7 @@ internal class DiskNameAndBarView: NSView {
         let width: CGFloat = (view.frame.width * (percentage < 0 ? 0 : percentage)) / 1
         self.usedBarSpace = NSView(frame: NSRect(x: 0, y: 0, width: width, height: view.frame.height))
         self.usedBarSpace?.wantsLayer = true
-        self.usedBarSpace?.layer?.backgroundColor = NSColor.controlAccentColor.cgColor
+        self.usedBarSpace?.layer?.backgroundColor = controlAccentColor.cgColor
         
         view.addSubview(self.usedBarSpace!)
         self.addSubview(view)
diff --git a/Modules/Net/popup.swift b/Modules/Net/popup.swift
index 1926b38e..5fbdb088 100644
--- a/Modules/Net/popup.swift
+++ b/Modules/Net/popup.swift
@@ -166,7 +166,9 @@ internal class Popup: NSStackView, Popup_p {
         button.bezelStyle = .regularSquare
         button.isBordered = false
         button.imageScaling = NSImageScaling.scaleAxesIndependently
-        button.contentTintColor = .lightGray
+        if #available(OSX 10.14, *) {
+            button.contentTintColor = .lightGray
+        }
         button.action = #selector(self.resetTotalNetworkUsage)
         button.target = self
         button.toolTip = localizedString("Reset")
@@ -212,7 +214,9 @@ internal class Popup: NSStackView, Popup_p {
         button.bezelStyle = .regularSquare
         button.isBordered = false
         button.imageScaling = NSImageScaling.scaleAxesIndependently
-        button.contentTintColor = .lightGray
+        if #available(OSX 10.14, *) {
+            button.contentTintColor = .lightGray
+        }
         button.action = #selector(self.refreshPublicIP)
         button.target = self
         button.toolTip = localizedString("Refresh")
diff --git a/Stats/Views/Settings.swift b/Stats/Views/Settings.swift
index 9bc720fc..e7679382 100644
--- a/Stats/Views/Settings.swift
+++ b/Stats/Views/Settings.swift
@@ -32,7 +32,9 @@ class SettingsWindow: NSWindow, NSWindowDelegate {
         self.animationBehavior = .default
         self.collectionBehavior = .moveToActiveSpace
         self.titlebarAppearsTransparent = true
-        self.appearance = NSAppearance(named: .darkAqua)
+        if #available(OSX 10.14, *) {
+            self.appearance = NSAppearance(named: .darkAqua)
+        }
         self.center()
         self.setIsVisible(false)
         
@@ -235,7 +237,9 @@ private class SettingsView: NSView {
         button.translatesAutoresizingMaskIntoConstraints = false
         button.imageScaling = .scaleNone
         button.image = Bundle(for: type(of: self)).image(forResource: image)!
-        button.contentTintColor = .lightGray
+        if #available(OSX 10.14, *) {
+            button.contentTintColor = .lightGray
+        }
         button.isBordered = false
         button.action = action
         button.target = self
diff --git a/Stats/Views/Update.swift b/Stats/Views/Update.swift
index e708a8a8..c95c15f9 100644
--- a/Stats/Views/Update.swift
+++ b/Stats/Views/Update.swift
@@ -34,7 +34,9 @@ class UpdateWindow: NSWindow, NSWindowDelegate {
         self.animationBehavior = .default
         self.collectionBehavior = .transient
         self.titlebarAppearsTransparent = true
-        self.appearance = NSAppearance(named: .darkAqua)
+        if #available(OSX 10.14, *) {
+            self.appearance = NSAppearance(named: .darkAqua)
+        }
         self.center()
         self.setIsVisible(false)