diff --git a/CHANGELOG.md b/CHANGELOG.md
index 60f9c8d3..943a38fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ Change Log
 
 - add **Swift Package Manager** support
 - add target for building binary framework
+- macOS requirement is now 11.0
 
 #### Breaking
 
diff --git a/Docs/Documentation/Getting Started.md b/Docs/Documentation/Getting Started.md
index ede54d92..777ae20e 100644
--- a/Docs/Documentation/Getting Started.md	
+++ b/Docs/Documentation/Getting Started.md	
@@ -23,7 +23,7 @@
 
 - iOS 12
 - tvOS 12
-- macOS 10.12
+- macOS 11
 - Xcode 11/Swift 5
 
 
@@ -36,7 +36,7 @@ The **SKTiled** project contains six targets; three are demo applications for iO
 
 ### Framework Installation
 
-To use the frameworks, build the appropriate framework target and add to your project. Make sure the **Minimum Deployment Target** is set correctly for your project (iOS11+/macOS 10.12+/tvOS12+).
+To use the frameworks, build the appropriate framework target and add to your project. Make sure the **Minimum Deployment Target** is set correctly for your project (iOS11+/macOS 11+/tvOS12+).
 
 ![adding framework](images/framework.png)
 
diff --git a/Package.swift b/Package.swift
index 3718e15d..97310afd 100644
--- a/Package.swift
+++ b/Package.swift
@@ -44,7 +44,7 @@ let package = Package(
               .copy("Assets/monsters-16x16.png"),
               .copy("Assets/monsters-16x16.tsx"),
               .copy("Assets/portraits-8x8.png"),
-              .copy("Assets/portraits-8x8.tsx")
+              .copy("Assets/portraits-8x8.tsx"),
             ]
         )
     ]
diff --git a/README.md b/README.md
index 829d54f0..9620dea8 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ Check out the [**Official Documentation**][sktiled-12-doc-url].
 
 - iOS 12
 - tvOS 12
-- macOS 10.12
+- macOS 11
 - Xcode 11/Swift 5
 
 ## Installation
diff --git a/SKTiled.podspec b/SKTiled.podspec
index 73fd85ec..9584af0a 100644
--- a/SKTiled.podspec
+++ b/SKTiled.podspec
@@ -3,13 +3,13 @@ Pod::Spec.new do |s|
   s.version                = "1.23"
   s.summary                = "SKTiled is a framework for using Tiled content with Apple's SpriteKit."
   s.description            = <<-DESC
-                            SKTiled is a framework for using Tiled content with Apple's SpriteKit, allowing the creation of game assets from .tmx files.
+                            SKTiled is a framework for using Tiled content with Apple's SpriteKit, allowing the creation of game assets from Tiled .tmx files.
                             DESC
   s.author                 = { "Michael Fessenden" => "michael.fessenden@gmail.com" }
   s.homepage               = "https://github.com/mfessenden/SKTiled"
   s.license                = { :type => 'MIT', :file => 'LICENSE.md' }
 
-  s.osx.deployment_target  = '10.12'
+  s.osx.deployment_target  = '11.0'
   s.ios.deployment_target  = '12.0'
   s.tvos.deployment_target = '12.0'
   s.source                 = { :git => "https://github.com/mfessenden/SKTiled.git", :tag => s.version }
@@ -17,6 +17,6 @@ Pod::Spec.new do |s|
   s.source_files           = 'Sources/*.swift'
   s.requires_arc           = true
 
-  s.swift_versions         = [5, 5.2, 5.3]
+  s.swift_versions         = [5, 5.2, 5.3, 5.4, 5.5]
 
 end
diff --git a/SKTiled.xcodeproj/project.pbxproj b/SKTiled.xcodeproj/project.pbxproj
index 4398ec47..c3b063ed 100644
--- a/SKTiled.xcodeproj/project.pbxproj
+++ b/SKTiled.xcodeproj/project.pbxproj
@@ -1074,7 +1074,6 @@
 				4CA6A7FD21875FD9002BC924 /* TilemapTests.swift */,
 				4CA6A8032188C9A0002BC924 /* TilesetTests.swift */,
 				4C1D689021932E6200D2D042 /* QueryTests.swift */,
-				4CA6A8072188CD93002BC924 /* Tests+Extensions.swift */,
 			);
 			path = Tests;
 			sourceTree = "<group>";
@@ -1203,6 +1202,7 @@
 		4CF1D2692555E57900A6CC25 /* Supporting Files */ = {
 			isa = PBXGroup;
 			children = (
+				4CA6A8072188CD93002BC924 /* Tests+Extensions.swift */,
 				4CF1D2372555E39300A6CC25 /* TestMapDelegate.swift */,
 				4CF1D2382555E39300A6CC25 /* TestTilesetDelegate.swift */,
 			);
@@ -2426,7 +2426,6 @@
 				SKIP_INSTALL = YES;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};
@@ -2458,7 +2457,6 @@
 				SDKROOT = appletvos;
 				SKIP_INSTALL = YES;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};
@@ -2489,7 +2487,6 @@
 				SDKROOT = appletvos;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 12.0;
 			};
 			name = Debug;
 		};
@@ -2517,7 +2514,6 @@
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SDKROOT = appletvos;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 12.0;
 			};
 			name = Release;
 		};
@@ -2681,7 +2677,6 @@
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = "Tests/Info-iOS.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
@@ -2704,7 +2699,6 @@
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = "Tests/Info-iOS.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_FAST_MATH = YES;
 				PRODUCT_NAME = SKTiledTests;
@@ -2731,7 +2725,6 @@
 				SDKROOT = appletvos;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 12.0;
 			};
 			name = Debug;
 		};
@@ -2753,7 +2746,6 @@
 				PRODUCT_NAME = SKTiledTests;
 				SDKROOT = appletvos;
 				TARGETED_DEVICE_FAMILY = 3;
-				TVOS_DEPLOYMENT_TARGET = 12.0;
 			};
 			name = Release;
 		};
@@ -2771,7 +2763,6 @@
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = "Tests/Info-macOS.plist";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.14;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				PRODUCT_NAME = SKTiledTests;
@@ -2795,7 +2786,6 @@
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = "Tests/Info-macOS.plist";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
-				MACOSX_DEPLOYMENT_TARGET = 10.14;
 				MTL_FAST_MATH = YES;
 				PRODUCT_NAME = SKTiledTests;
 				SDKROOT = macosx;
@@ -2850,7 +2840,7 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 11.3;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				OTHER_LDFLAGS = "-lz";
@@ -2904,7 +2894,7 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 11.3;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				OTHER_LDFLAGS = "-lz";
 				OTHER_SWIFT_FLAGS = "-DRENDER_STATS";
diff --git a/Sources/SKTiled+Debug.swift b/Sources/SKTiled+Debug.swift
index 39431ea8..34a3e9de 100644
--- a/Sources/SKTiled+Debug.swift
+++ b/Sources/SKTiled+Debug.swift
@@ -206,7 +206,7 @@ extension SKTiledDebugDrawNode: Loggable {}
 
 
 /// :nodoc:
-protocol CustomDebugReflectable: class {
+protocol CustomDebugReflectable: AnyObject {
     func dumpStatistics()
 }
 
diff --git a/Sources/SKTiledObject.swift b/Sources/SKTiledObject.swift
index ac756c33..4b4688bc 100644
--- a/Sources/SKTiledObject.swift
+++ b/Sources/SKTiledObject.swift
@@ -69,7 +69,7 @@ import SpriteKit
  
  [sktiledobject-url]:Protocols/SKTiledObject.html
  */
-@objc public protocol SKTiledObject: class {
+@objc public protocol SKTiledObject: AnyObject {
     /// Unique object id (layer & object names may not be unique).
     var uuid: String { get set }
     
diff --git a/Sources/SKTileset.swift b/Sources/SKTileset.swift
index 7e38fdf8..97b047cd 100644
--- a/Sources/SKTileset.swift
+++ b/Sources/SKTileset.swift
@@ -461,28 +461,28 @@ public class SKTileset: NSObject, SKTiledObject {
             log("tile data exists at id: \(tileID)", level: .error)
             return nil
         }
-
+    
         isImageCollection = true
 
-        let inputURL = URL(fileURLWithPath: source)
-        let filename = inputURL.deletingPathExtension().lastPathComponent
-        let fileExtension = inputURL.pathExtension
-
-        guard let urlPath = Bundle.main.url(forResource: filename, withExtension: fileExtension) else {
+        // standardize the url
+        let inputURL = URL(fileURLWithPath: source).standardized
+        
+        // check to see if
+        guard let imageDataProvider = CGDataProvider(url: inputURL as CFURL) else {
+            log("invalid image source '\(inputURL.path)'.", level: .error)
             return nil
         }
-
-        // read image from file
-        let imageDataProvider = CGDataProvider(url: urlPath as CFURL)!
-
+        
         // create a data provider
         let image = CGImage(pngDataProviderSource: imageDataProvider, decode: nil, shouldInterpolate: false, intent: .defaultIntent)!
         let sourceTexture = SKTexture(cgImage: image)
         sourceTexture.filteringMode = .nearest
-
+        
+        // create the tile data and set the source size here (as tileset size won't be accurate)
         let data = SKTilesetData(id: tileID, texture: sourceTexture, tileSet: self)
+        data.sourceSize = sourceTexture.size()
         data.ignoreProperties = ignoreProperties
-
+        
         // add the image name to the source attribute
         data.source = source
         self.tileData.insert(data)
diff --git a/Sources/SKTilesetData.swift b/Sources/SKTilesetData.swift
index c1215e98..b9215226 100644
--- a/Sources/SKTilesetData.swift
+++ b/Sources/SKTilesetData.swift
@@ -70,6 +70,9 @@ public class SKTilesetData: SKTiledObject {
 
     /// Source image name (collections tileset)
     public var source: String! = nil
+    
+    /// Source image size (collections tileset)
+    public var sourceSize: CGSize?
 
     /// Tile occurance probability (parsed from Tiled, not currently used).
 
diff --git a/Sources/TiledSceneCameraDelegate.swift b/Sources/TiledSceneCameraDelegate.swift
index 473d54c4..7f933933 100644
--- a/Sources/TiledSceneCameraDelegate.swift
+++ b/Sources/TiledSceneCameraDelegate.swift
@@ -61,7 +61,7 @@ import SpriteKit
  [tiled-scene-camera-delegate-image]:https://mfessenden.github.io/SKTiled/images/camera-delegate.svg
 
  */
-@objc public protocol SKTiledSceneCameraDelegate: class {
+@objc public protocol SKTiledSceneCameraDelegate: AnyObject {
 
     /**
      Allow delegate to receive updates from camera.
diff --git a/Sources/TiledSceneDelegate.swift b/Sources/TiledSceneDelegate.swift
index 1c002bee..cb7c78eb 100644
--- a/Sources/TiledSceneDelegate.swift
+++ b/Sources/TiledSceneDelegate.swift
@@ -60,7 +60,7 @@ import GameplayKit
  [skscene-url]:https://developer.apple.com/reference/spritekit/skscene
  [sktiledscenedelegate-image-url]:https://mfessenden.github.io/SKTiled/images/scene-hierarchy.svg
  */
-public protocol SKTiledSceneDelegate: class {
+public protocol SKTiledSceneDelegate: AnyObject {
 
     /// Root container node. Tiled assets are parented to this node.
     var worldNode: SKNode! { get set }
diff --git a/Sources/TilemapDelegate.swift b/Sources/TilemapDelegate.swift
index 90b54aae..b0913965 100644
--- a/Sources/TilemapDelegate.swift
+++ b/Sources/TilemapDelegate.swift
@@ -69,7 +69,7 @@ import GameplayKit
  }
  ```
  */
-public protocol SKTilemapDelegate: class {
+public protocol SKTilemapDelegate: AnyObject {
     var zDeltaForLayers: CGFloat { get }
     func didBeginParsing(_ tilemap: SKTilemap)
     func didAddTileset(_ tileset: SKTileset)
diff --git a/Sources/TilesetDataSource.swift b/Sources/TilesetDataSource.swift
index b5cad2a1..0eb2a2e5 100644
--- a/Sources/TilesetDataSource.swift
+++ b/Sources/TilesetDataSource.swift
@@ -63,7 +63,7 @@ import SpriteKit
  }
  ```
  */
-public protocol SKTilesetDataSource: class {
+public protocol SKTilesetDataSource: AnyObject {
 
     /**
      Provide an image name for the tileset before textures are generated.
diff --git a/Tests/ColorTests.swift b/Tests/ColorTests.swift
index 23099caf..0c8da2de 100644
--- a/Tests/ColorTests.swift
+++ b/Tests/ColorTests.swift
@@ -164,12 +164,13 @@ class ColorTests: XCTestCase {
         let firstTextColorHexValue = firstTestColor.hexString()
         
         // second value (4 characters)
-        let secondShortHexString = "#854"
-        let secondExpectedHexValue = "#885544"
+        let secondShortHexString = "#5ba"
+        let secondExpectedHexValue = "#55bbaa"
         let secondTestColor = SKColor(hexString: secondShortHexString)
         let secondTextColorHexValue = secondTestColor.hexString()
         
         XCTAssertEqual(firstTextColorHexValue, firstExpectedHexValue, "❗️ incorrect hex to color conversion, `\(firstShortHexString)` does not equal `\(firstExpectedHexValue)`")
+        XCTAssertEqual(secondTextColorHexValue, secondExpectedHexValue, "❗️ incorrect hex to color conversion, `\(secondShortHexString)` does not equal `\(secondExpectedHexValue)`")
     }
 }
 
diff --git a/Tests/CoordinateTests.swift b/Tests/CoordinateTests.swift
index 1576426e..36a6fd3f 100644
--- a/Tests/CoordinateTests.swift
+++ b/Tests/CoordinateTests.swift
@@ -46,7 +46,11 @@ class CoordinateTests: XCTestCase {
         
         if (testBundle == nil) {
             TiledGlobals.default.loggingLevel = .none
+            #if SWIFT_PACKAGE
             testBundle = Bundle.module
+            #else
+            testBundle = Bundle(for: type(of: self))
+            #endif
         }
         
         if (tilemap == nil) {
diff --git a/Tests/ParserTests.swift b/Tests/ParserTests.swift
index 08f7121e..92d8f1e4 100644
--- a/Tests/ParserTests.swift
+++ b/Tests/ParserTests.swift
@@ -43,12 +43,15 @@ class ParserTests: XCTestCase {
         super.setUp()
         
         if (testBundle == nil) {
+            #if SWIFT_PACKAGE
             testBundle = Bundle.module
+            #else
+            testBundle = Bundle(for: type(of: self))
+            #endif
         }
         
         if (tilemap == nil) {
             print("➜ loading test tilemap: \"\(tilemapName)\"...")
-            
             let mapurl = testBundle!.url(forResource: tilemapName, withExtension: "tmx")!
             tilemap = SKTilemap.load(tmxFile: mapurl.path, delegate: tilemapDelegate,
                                      tilesetDataSource: tilesetDelegate, loggingLevel: .none)
diff --git a/Tests/PropertiesTests.swift b/Tests/PropertiesTests.swift
index 0beaab2a..7e8d7229 100644
--- a/Tests/PropertiesTests.swift
+++ b/Tests/PropertiesTests.swift
@@ -39,7 +39,11 @@ class PropertiesTests: XCTestCase {
         
         if (testBundle == nil) {
             TiledGlobals.default.loggingLevel = .none
+            #if SWIFT_PACKAGE
             testBundle = Bundle.module
+            #else
+            testBundle = Bundle(for: type(of: self))
+            #endif
         }
         
         if (tilemap == nil) {
diff --git a/Tests/QueryTests.swift b/Tests/QueryTests.swift
index 10633a0c..62e0decd 100644
--- a/Tests/QueryTests.swift
+++ b/Tests/QueryTests.swift
@@ -42,7 +42,11 @@ class QueryTests: XCTestCase {
         
         if (testBundle == nil) {
             TiledGlobals.default.loggingLevel = .none
+            #if SWIFT_PACKAGE
             testBundle = Bundle.module
+            #else
+            testBundle = Bundle(for: type(of: self))
+            #endif
         }
         
         if (tilemap == nil) {
diff --git a/Tests/TilemapTests.swift b/Tests/TilemapTests.swift
index 2800e255..87276790 100644
--- a/Tests/TilemapTests.swift
+++ b/Tests/TilemapTests.swift
@@ -40,7 +40,11 @@ class TilemapTests: XCTestCase {
         
         if (testBundle == nil) {
             TiledGlobals.default.loggingLevel = .none
+            #if SWIFT_PACKAGE
             testBundle = Bundle.module
+            #else
+            testBundle = Bundle(for: type(of: self))
+            #endif
         }
         
         if (tilemap == nil) {
diff --git a/Tests/TilesetTests.swift b/Tests/TilesetTests.swift
index a2309e2a..d8d77f3b 100644
--- a/Tests/TilesetTests.swift
+++ b/Tests/TilesetTests.swift
@@ -43,7 +43,11 @@ class TilesetTests: XCTestCase {
 
         if (testBundle == nil) {
             TiledGlobals.default.loggingLevel = .none
+            #if SWIFT_PACKAGE
             testBundle = Bundle.module
+            #else
+            testBundle = Bundle(for: type(of: self))
+            #endif
         }
 
         if (tilemap == nil) {