diff --git a/Sources/UXKit/AppKit/NSTableViewCell.swift b/Sources/UXKit/AppKit/NSTableViewCell.swift
index 56c4642..bf29fef 100644
--- a/Sources/UXKit/AppKit/NSTableViewCell.swift
+++ b/Sources/UXKit/AppKit/NSTableViewCell.swift
@@ -1,7 +1,7 @@
 //
 //  UXKit
 //
-//  Copyright © 2016-2019 ZeeZide GmbH. All rights reserved.
+//  Copyright © 2016-2023 ZeeZide GmbH. All rights reserved.
 //
 #if os(macOS)
   import Cocoa
@@ -43,13 +43,8 @@
       let padding      : CGFloat = 8.0
       let labelPadding : CGFloat = 4.0
       
-      #if swift(>=4.0)
-        let labelSize       = UXFont.systemFontSize + 4.0
-        let detailLabelSize = UXFont.smallSystemFontSize
-      #else
-        let labelSize       = UXFont.systemFontSize() + 4.0
-        let detailLabelSize = UXFont.smallSystemFontSize()
-      #endif
+      let labelSize       = UXFont.systemFontSize + 4.0
+      let detailLabelSize = UXFont.smallSystemFontSize
       
       //let detailColor     = UXColor.secondaryLabelColor  // 10.10
       let detailColor     = UXColor.darkGray
diff --git a/Sources/UXKit/AppKit/UXGraphics-AppKit.swift b/Sources/UXKit/AppKit/UXGraphics-AppKit.swift
index da49f22..ef77aef 100644
--- a/Sources/UXKit/AppKit/UXGraphics-AppKit.swift
+++ b/Sources/UXKit/AppKit/UXGraphics-AppKit.swift
@@ -1,7 +1,7 @@
 //
 //  UXKit
 //
-//  Copyright © 2016-2022 ZeeZide GmbH. All rights reserved.
+//  Copyright © 2016-2023 ZeeZide GmbH. All rights reserved.
 //
 #if os(macOS)
   import Cocoa
@@ -18,11 +18,7 @@
 
   public typealias UXImage            = NSImage
 
-  #if swift(>=4.0)
-    public typealias UXEdgeInsets     = NSEdgeInsets
-  #else
-    public typealias UXEdgeInsets     = EdgeInsets
-  #endif
+  public typealias UXEdgeInsets       = NSEdgeInsets
 
   public extension UXColor {
   
diff --git a/Sources/UXKit/AppKit/UXLayout-AppKit.swift b/Sources/UXKit/AppKit/UXLayout-AppKit.swift
index 38d777c..f5ae750 100644
--- a/Sources/UXKit/AppKit/UXLayout-AppKit.swift
+++ b/Sources/UXKit/AppKit/UXLayout-AppKit.swift
@@ -1,7 +1,7 @@
 //
 //  UXKit
 //
-//  Copyright © 2016-2021 ZeeZide GmbH. All rights reserved.
+//  Copyright © 2016-2023 ZeeZide GmbH. All rights reserved.
 //
 #if os(macOS)
   import Cocoa
@@ -11,25 +11,10 @@
   @available(OSX 10.11, *)
   public typealias UXLayoutGuide      = NSLayoutGuide
 
-#if swift(>=4.0)
   public extension NSStackView {
-    typealias Alignment        = NSLayoutConstraint.Attribute
-    typealias UXAlignment      = NSLayoutConstraint.Attribute
-    typealias Axis             = NSUserInterfaceLayoutOrientation
+    typealias Alignment               = NSLayoutConstraint.Attribute
+    typealias UXAlignment             = NSLayoutConstraint.Attribute
+    typealias Axis                    = NSUserInterfaceLayoutOrientation
   }
-#else // Swift 3.2
-  public extension NSLayoutConstraint {
-    public typealias Attribute        = NSLayoutAttribute
-    public typealias Relation         = NSLayoutRelation
-    #if false // crashes 3.2 in Xcode 9 9A235 - Because it exists? in 3.2? But not in 3.1?
-      public typealias Priority       = NSLayoutPriority
-    #endif
-  }
-  public extension NSStackView {
-    public typealias Distribution     = NSStackViewDistribution
-    public typealias Alignment        = NSLayoutAttribute
-    public typealias UXAlignment      = NSLayoutAttribute
-  }
-#endif
   public typealias UXStackViewAxis    = NSUserInterfaceLayoutOrientation
 #endif
diff --git a/Sources/UXKit/AppKit/UXView-AppKit.swift b/Sources/UXKit/AppKit/UXView-AppKit.swift
index 4d55200..b19286c 100644
--- a/Sources/UXKit/AppKit/UXView-AppKit.swift
+++ b/Sources/UXKit/AppKit/UXView-AppKit.swift
@@ -30,12 +30,8 @@
   
   // MARK: - UXUserInterfaceItemIdentification
 
-  #if os(macOS) && swift(>=4.0)
-    public typealias UXUserInterfaceItemIdentifier =
-                       NSUserInterfaceItemIdentifier
-  #else
-    public typealias UXUserInterfaceItemIdentifier = String
-  #endif
+  public typealias UXUserInterfaceItemIdentifier =
+                     NSUserInterfaceItemIdentifier
   
   public typealias UXUserInterfaceItemIdentification =
                      NSUserInterfaceItemIdentification
@@ -90,19 +86,11 @@
   /// Add UISwitch `isOn` property. The AppKit variant has 3 states.
   public extension NSButton {
     
-    #if swift(>=4.0)
-      /// Use this instead of `state` for UIKit compatibility.
-      var isOn: Bool {
-        set { state = newValue ? .on : .off }
-        get { return state == .on }
-      }
-    #else // Swift 3
-      /// Use this instead of `state` for UIKit compatibility.
-      public var isOn: Bool {
-        set { state = newValue ? NSOnState : NSOffState }
-        get { return state == NSOnState }
-      }
-    #endif
+    /// Use this instead of `state` for UIKit compatibility.
+    var isOn: Bool {
+      set { state = newValue ? .on : .off }
+      get { return state == .on }
+    }
   }
   
   public extension NSTextField {
diff --git a/Sources/UXKit/Common/UXIndexPath.swift b/Sources/UXKit/Common/UXIndexPath.swift
index f6bc0fb..4800ab9 100644
--- a/Sources/UXKit/Common/UXIndexPath.swift
+++ b/Sources/UXKit/Common/UXIndexPath.swift
@@ -1,23 +1,23 @@
 //
 //  UXKit
 //
-//  Copyright © 2016-2017 ZeeZide GmbH. All rights reserved.
+//  Copyright © 2016-2023 ZeeZide GmbH. All rights reserved.
 //
 import Foundation
 
 #if os(macOS)
-  #if swift(>=4.0)
-    // Hm. It does seem to have it (produces ambiguities). But maybe not.
-    import AppKit
-  #else
-    public extension IndexPath {
-    
-      public init(row: Int, section: Int) {
-        self.init(indexes: [ section, row ])
-      }
-      public var section : Int { return self[0] }
-      public var row     : Int { return self[1] }
+  import AppKit
+
+  // Hm. It does seem to have it (produces ambiguities). But maybe not.
+  #if false
+  public extension IndexPath {
+  
+    public init(row: Int, section: Int) {
+      self.init(indexes: [ section, row ])
     }
+    public var section : Int { return self[0] }
+    public var row     : Int { return self[1] }
+  }
   #endif
 #endif