diff --git a/Sources/Controller/LicenceListViewController.swift b/Sources/Controller/LicenceListViewController.swift
index cd8fe2e..fe26341 100644
--- a/Sources/Controller/LicenceListViewController.swift
+++ b/Sources/Controller/LicenceListViewController.swift
@@ -6,9 +6,13 @@
 //  Copyright © 2018 OpenSourceController. All rights reserved.
 //
 
+#if !os(macOS)
 import UIKit
+#else
+import AppKit
+#endif
 
-final class LicenceListViewController: UITableViewController {
+open class LicenceListViewController: UITableViewController {
     
     // MARK: - Var
     
@@ -24,11 +28,11 @@ final class LicenceListViewController: UITableViewController {
         super.init(style: .plain)
     }
     
-    required init?(coder aDecoder: NSCoder) {
+    required public init?(coder aDecoder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
     
-    override func viewDidLoad() {
+    override open func viewDidLoad() {
         super.viewDidLoad()
         
         self.prepareTableView()
@@ -50,22 +54,22 @@ extension LicenceListViewController {
     
     // MARK: - Table View Data Source
     
-    override func numberOfSections(in tableView: UITableView) -> Int {
+    override open func numberOfSections(in tableView: UITableView) -> Int {
         return 1
     }
     
-    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+    override open func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
         return self.downloadedLicence.count
     }
     
-    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+    override open func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
         let cell: OpenSourceTableViewCell = tableView.dequeueReusableCell(for: indexPath)
         guard let licence = self.downloadedLicence.get(at: indexPath.row) else { return cell }
         cell.configure(licence: licence, config: self.config)
         return cell
     }
     
-    override func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
+    override open func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
         return UITableView.automaticDimension
     }
 }
diff --git a/Sources/Controller/LoadingViewController.swift b/Sources/Controller/LoadingViewController.swift
index cdaeebc..0f01fa7 100644
--- a/Sources/Controller/LoadingViewController.swift
+++ b/Sources/Controller/LoadingViewController.swift
@@ -8,7 +8,7 @@
 
 import UIKit
 
-final class LoadingViewController: UIViewController {
+open class LoadingViewController: UIViewController {
     
     // MARK: - Var
     
@@ -32,11 +32,11 @@ final class LoadingViewController: UIViewController {
         super.init(nibName: nil, bundle: nil)
     }
     
-    required init?(coder aDecoder: NSCoder) {
+    required public init?(coder aDecoder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
     
-    override func viewDidLoad() {
+    override open func viewDidLoad() {
         super.viewDidLoad()
         
         self.view.backgroundColor = self.config.uiConfig.backgroundColor
diff --git a/Sources/Controller/OpenSourceTableViewCell.swift b/Sources/Controller/OpenSourceTableViewCell.swift
index fc15ea2..855c660 100644
--- a/Sources/Controller/OpenSourceTableViewCell.swift
+++ b/Sources/Controller/OpenSourceTableViewCell.swift
@@ -6,7 +6,7 @@
 
 import UIKit
 
-final class OpenSourceTableViewCell: UITableViewCell, Reusable {
+open class OpenSourceTableViewCell: UITableViewCell, Reusable {
 
     // MARK: - Lifecycle
 
@@ -15,7 +15,7 @@ final class OpenSourceTableViewCell: UITableViewCell, Reusable {
         self.prepareCellComponent()
     }
 
-    required init?(coder aDecoder: NSCoder) {
+    required public init?(coder aDecoder: NSCoder) {
         super.init(coder: aDecoder)
     }
 
diff --git a/Sources/Controller/OpenSourceViewController.swift b/Sources/Controller/OpenSourceViewController.swift
index 46fb1b8..b73161f 100644
--- a/Sources/Controller/OpenSourceViewController.swift
+++ b/Sources/Controller/OpenSourceViewController.swift
@@ -6,7 +6,7 @@
 
 import UIKit
 
-final class OpenSourceViewController: UIViewController {
+open class OpenSourceViewController: UIViewController {
     
     // MARK: - Var
     
@@ -42,11 +42,11 @@ final class OpenSourceViewController: UIViewController {
         super.init(nibName: nil, bundle: nil)
     }
     
-    required init?(coder aDecoder: NSCoder) {
+    required public init?(coder aDecoder: NSCoder) {
         fatalError("init(coder:) has not been implemented")
     }
     
-    override func viewDidLoad() {
+    override open func viewDidLoad() {
         super.viewDidLoad()
         
         self.title = self.config.title
diff --git a/Sources/Loader/HTTPDataLoader.swift b/Sources/Loader/HTTPDataLoader.swift
index 302833e..5f9a2c7 100644
--- a/Sources/Loader/HTTPDataLoader.swift
+++ b/Sources/Loader/HTTPDataLoader.swift
@@ -8,7 +8,7 @@
 
 import Foundation
 
-final class HTTPDataLoader {
+open class HTTPDataLoader {
     func loadData(fromUrl url: String, completion: @escaping (Data?) -> Void) {
         if let url = URL(string: url) {
             let task = URLSession.shared.dataTask(with: url) { (data, _, error) in
diff --git a/Sources/Loader/LicenceLoader.swift b/Sources/Loader/LicenceLoader.swift
index ce24bfd..0a4b809 100644
--- a/Sources/Loader/LicenceLoader.swift
+++ b/Sources/Loader/LicenceLoader.swift
@@ -6,7 +6,7 @@
 
 import UIKit
 
-final class LicenceLoader {
+open class LicenceLoader {
 
     /// Download every licence 
     ///
@@ -32,4 +32,6 @@ final class LicenceLoader {
             completion()
         }
     }
+    public init() {
+    }
 }
diff --git a/Sources/Model/LicenceFile.swift b/Sources/Model/LicenceFile.swift
index 277af8c..37994e1 100644
--- a/Sources/Model/LicenceFile.swift
+++ b/Sources/Model/LicenceFile.swift
@@ -6,7 +6,7 @@
 
 import UIKit
 
-public final class LicenceFile {
+open class LicenceFile {
 
     // MARK- Var 
 
diff --git a/Sources/OpenSourceControllerConfig.swift b/Sources/OpenSourceControllerConfig.swift
index 30e9683..331c45d 100644
--- a/Sources/OpenSourceControllerConfig.swift
+++ b/Sources/OpenSourceControllerConfig.swift
@@ -35,5 +35,8 @@ public struct OpenSourceControllerConfig {
     public var verbose: Bool = false
 
     /// UI-specific configuration.
+    
+    public init() {
+    }
     public var uiConfig = UIConfig()
 }
diff --git a/Sources/Utils/UITableView+Extensions.swift b/Sources/Utils/UITableView+Extensions.swift
index 670991b..b0e10f5 100644
--- a/Sources/Utils/UITableView+Extensions.swift
+++ b/Sources/Utils/UITableView+Extensions.swift
@@ -9,12 +9,12 @@
 import UIKit
 
 extension UITableView { 
-    final func register<T: UITableViewCell>(cellType: T.Type)
+    open func register<T: UITableViewCell>(cellType: T.Type)
         where T: Reusable {
             self.register(cellType.self, forCellReuseIdentifier: cellType.reuseIdentifier)
     }
     
-    final func dequeueReusableCell<T: UITableViewCell>(for indexPath: IndexPath, cellType: T.Type = T.self) -> T
+    open func dequeueReusableCell<T: UITableViewCell>(for indexPath: IndexPath, cellType: T.Type = T.self) -> T
         where T: Reusable {
             guard let cell = self.dequeueReusableCell(withIdentifier: cellType.reuseIdentifier, for: indexPath) as? T else {
                 fatalError(