essentialdevelopercom · mapostolakis · Oct 2, 2025 · Oct 2, 2025 · Oct 2, 2025 · Oct 2, 2025
diff --git a/.github/workflows/CI-iOS.yml b/.github/workflows/CI-iOS.yml
@@ -12,7 +12,7 @@ jobs:
   # This workflow contains a single job called "build-and-test"
   build-and-test:
     # The type of runner that the job will run on
-    runs-on: macos-15-xlarge
+    runs-on: macos-26-xlarge
 
     timeout-minutes: 8
 
@@ -22,10 +22,10 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Select Xcode
-      run: sudo xcode-select -switch /Applications/Xcode_16.2.app
+      run: sudo xcode-select -switch /Applications/Xcode_26.0.app
 
     - name: Xcode version
       run: /usr/bin/xcodebuild -version
 
     - name: Build and Test
-      run: xcodebuild clean build test -workspace EssentialApp/EssentialApp.xcworkspace -scheme "CI_iOS" CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO -sdk iphonesimulator -destination "platform=iOS Simulator,name=iPhone 16 Pro,OS=18.2" ONLY_ACTIVE_ARCH=YES
+      run: xcodebuild clean build test -workspace EssentialApp/EssentialApp.xcworkspace -scheme "CI_iOS" CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO -sdk iphonesimulator -destination "platform=iOS Simulator,name=iPhone 17 Pro,OS=26.0" ONLY_ACTIVE_ARCH=YES
diff --git a/.github/workflows/CI-macOS.yml b/.github/workflows/CI-macOS.yml
@@ -12,7 +12,7 @@ jobs:
   # This workflow contains a single job called "build-and-test"
   build-and-test:
     # The type of runner that the job will run on
-    runs-on: macos-15
+    runs-on: macos-26
 
     timeout-minutes: 8
 
@@ -22,7 +22,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Select Xcode
-      run: sudo xcode-select -switch /Applications/Xcode_16.2.app
+      run: sudo xcode-select -switch /Applications/Xcode_26.0.app
 
     - name: Xcode version
       run: /usr/bin/xcodebuild -version

diff --git a/.github/workflows/Deploy.yml b/.github/workflows/Deploy.yml
@@ -12,7 +12,7 @@ jobs:
   # This workflow contains a single job called "build-and-deploy"
   build-and-deploy:
     # The type of runner that the job will run on
-    runs-on: macos-15
+    runs-on: macos-26
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -36,7 +36,7 @@ jobs:
         security set-key-partition-list -S apple-tool:,apple: -s -k "" ~/Library/Keychains/build.keychain
 
     - name: Select Xcode
-      run: sudo xcode-select -switch /Applications/Xcode_16.2.app
+      run: sudo xcode-select -switch /Applications/Xcode_26.0.app
 
     - name: Xcode version
       run: /usr/bin/xcodebuild -version

diff --git a/EssentialApp/EssentialApp.xcodeproj/project.pbxproj b/EssentialApp/EssentialApp.xcodeproj/project.pbxproj
@@ -248,7 +248,7 @@
 			attributes = {
 				BuildIndependentTargetsInParallel = YES;
 				LastSwiftUpdateCheck = 1120;
-				LastUpgradeCheck = 1620;
+				LastUpgradeCheck = 2600;
 				ORGANIZATIONNAME = "Essential Developer";
 				TargetAttributes = {
 					0895DA82234B3B950031BB2D = {
@@ -420,7 +420,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 26.0;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -479,7 +479,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 26.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				SDKROOT = iphoneos;

diff --git a/EssentialApp/EssentialApp.xcworkspace/xcshareddata/xcschemes/CI_iOS.xcscheme b/EssentialApp/EssentialApp.xcworkspace/xcshareddata/xcschemes/CI_iOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1620"
+   LastUpgradeVersion = "2600"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

diff --git a/EssentialApp/EssentialApp.xcworkspace/xcshareddata/xcschemes/EssentialApp.xcscheme b/EssentialApp/EssentialApp.xcworkspace/xcshareddata/xcschemes/EssentialApp.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1620"
+   LastUpgradeVersion = "2600"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

diff --git a/EssentialApp/EssentialAppTests/FeedAcceptanceTests.swift b/EssentialApp/EssentialAppTests/FeedAcceptanceTests.swift
@@ -37,13 +37,13 @@ class FeedAcceptanceTests: XCTestCase {
 	func test_onLaunch_displaysCachedRemoteFeedWhenCustomerHasNoConnectivity() throws {
 		let sharedStore = try CoreDataFeedStore.empty
 
-		let onlineFeed = launch(httpClient: .online(response), store: sharedStore)
+		let onlineFeed = try launch(httpClient: .online(response), store: sharedStore)
 		onlineFeed.simulateFeedImageViewVisible(at: 0)
 		onlineFeed.simulateFeedImageViewVisible(at: 1)
 		onlineFeed.simulateLoadMoreFeedAction()
 		onlineFeed.simulateFeedImageViewVisible(at: 2)
 
-		let offlineFeed = launch(httpClient: .offline, store: sharedStore)
+		let offlineFeed = try launch(httpClient: .offline, store: sharedStore)
 
 		XCTAssertEqual(offlineFeed.numberOfRenderedFeedImageViews(), 3)
 		XCTAssertEqual(offlineFeed.renderedFeedImageData(at: 0), makeImageData0())
@@ -85,9 +85,11 @@ class FeedAcceptanceTests: XCTestCase {
 	private func launch(
 		httpClient: HTTPClientStub = .offline,
 		store: CoreDataFeedStore
-	) -> ListViewController {
+	) throws -> ListViewController {
 		let sut = SceneDelegate(httpClient: httpClient, store: store)
-		sut.window = UIWindow(frame: CGRect(x: 0, y: 0, width: 390, height: 1))
+		let dummyScene = try XCTUnwrap((UIWindowScene.self as NSObject.Type).init() as? UIWindowScene)
+		sut.window = UIWindow(windowScene: dummyScene)
+		sut.window?.frame = CGRect(x: 0, y: 0, width: 390, height: 1)
 		sut.configureWindow()
 
 		let nav = sut.window?.rootViewController as? UINavigationController

diff --git a/EssentialApp/EssentialAppTests/SceneDelegateTests.swift b/EssentialApp/EssentialAppTests/SceneDelegateTests.swift
@@ -8,20 +8,21 @@ import EssentialFeediOS
 
 class SceneDelegateTests: XCTestCase {
 
-	func test_configureWindow_setsWindowAsKeyAndVisible() {
-		let window = UIWindowSpy()
+	func test_configureWindow_setsWindowAsKeyAndVisible() throws {
 		let sut = SceneDelegate()
+
+		let window = try UIWindowSpy.make()
 		sut.window = window
 
 		sut.configureWindow()
 
 		XCTAssertEqual(window.makeKeyAndVisibleCallCount, 1, "Expected to make window key and visible")
 	}
 
-	func test_configureWindow_configuresRootViewController() {
+	func test_configureWindow_configuresRootViewController() throws {
 		let sut = SceneDelegate()
-		sut.window = UIWindowSpy()
-		
+		sut.window = try UIWindowSpy.make()
+
 		sut.configureWindow()
 
 		let root = sut.window?.rootViewController
@@ -35,6 +36,11 @@ class SceneDelegateTests: XCTestCase {
 	private class UIWindowSpy: UIWindow {
 		var makeKeyAndVisibleCallCount = 0
 
+		static func make() throws -> UIWindowSpy {
+			let dummyScene = try XCTUnwrap((UIWindowScene.self as NSObject.Type).init() as? UIWindowScene)
+			return UIWindowSpy(windowScene: dummyScene)
+		}
+
 		override func makeKeyAndVisible() {
 			makeKeyAndVisibleCallCount += 1
 		}

diff --git a/EssentialFeed/EssentialFeed.xcodeproj/project.pbxproj b/EssentialFeed/EssentialFeed.xcodeproj/project.pbxproj
@@ -1054,7 +1054,7 @@
 			attributes = {
 				BuildIndependentTargetsInParallel = YES;
 				LastSwiftUpdateCheck = 1020;
-				LastUpgradeCheck = 1620;
+				LastUpgradeCheck = 2600;
 				ORGANIZATIONNAME = "Essential Developer";
 				TargetAttributes = {
 					080EDEF021B6DA7E00813479 = {
@@ -1438,8 +1438,8 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
-				MACOSX_DEPLOYMENT_TARGET = 13.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 26.0;
+				MACOSX_DEPLOYMENT_TARGET = 26.0;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -1503,8 +1503,8 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
-				MACOSX_DEPLOYMENT_TARGET = 13.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 26.0;
+				MACOSX_DEPLOYMENT_TARGET = 26.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				SDKROOT = macosx;

diff --git a/EssentialFeed/EssentialFeed.xcodeproj/xcshareddata/xcschemes/CI_macOS.xcscheme b/EssentialFeed/EssentialFeed.xcodeproj/xcshareddata/xcschemes/CI_macOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1620"
+   LastUpgradeVersion = "2600"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

diff --git a/EssentialFeed/EssentialFeed.xcodeproj/xcshareddata/xcschemes/EssentialFeed.xcscheme b/EssentialFeed/EssentialFeed.xcodeproj/xcshareddata/xcschemes/EssentialFeed.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1620"
+   LastUpgradeVersion = "2600"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

diff --git a/...eed/EssentialFeed.xcodeproj/xcshareddata/xcschemes/EssentialFeedAPIEndToEndTests.xcscheme b/...eed/EssentialFeed.xcodeproj/xcshareddata/xcschemes/EssentialFeedAPIEndToEndTests.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1620"
+   LastUpgradeVersion = "2600"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

diff --git a/...ssentialFeed.xcodeproj/xcshareddata/xcschemes/EssentialFeedCacheIntegrationTests.xcscheme b/...ssentialFeed.xcodeproj/xcshareddata/xcschemes/EssentialFeedCacheIntegrationTests.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1620"
+   LastUpgradeVersion = "2600"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

diff --git a/EssentialFeed/EssentialFeed.xcodeproj/xcshareddata/xcschemes/EssentialFeediOS.xcscheme b/EssentialFeed/EssentialFeed.xcodeproj/xcshareddata/xcschemes/EssentialFeediOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1620"
+   LastUpgradeVersion = "2600"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

diff --git a/EssentialFeed/EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_CONTENT_dark.png b/EssentialFeed/EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_CONTENT_dark.png
diff --git a/EssentialFeed/EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_CONTENT_light.png b/EssentialFeed/EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_CONTENT_light.png
diff --git a/...FeediOSTests/Feed UI/snapshots/FEED_WITH_CONTENT_light_extraExtraExtraLarge.png b/...FeediOSTests/Feed UI/snapshots/FEED_WITH_CONTENT_light_extraExtraExtraLarge.png
diff --git a/...EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_FAILED_IMAGE_LOADING_dark.png b/...EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_FAILED_IMAGE_LOADING_dark.png
diff --git a/...ssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_FAILED_IMAGE_LOADING_light.png b/...ssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_FAILED_IMAGE_LOADING_light.png
diff --git a/...Feed/EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_LOAD_MORE_ERROR_dark.png b/...Feed/EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_LOAD_MORE_ERROR_dark.png
diff --git a/...ediOSTests/Feed UI/snapshots/FEED_WITH_LOAD_MORE_ERROR_extraExtraExtraLarge.png b/...ediOSTests/Feed UI/snapshots/FEED_WITH_LOAD_MORE_ERROR_extraExtraExtraLarge.png
diff --git a/...eed/EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_LOAD_MORE_ERROR_light.png b/...eed/EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_LOAD_MORE_ERROR_light.png
diff --git a/.../EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_LOAD_MORE_INDICATOR_dark.png b/.../EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_LOAD_MORE_INDICATOR_dark.png
diff --git a/...EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_LOAD_MORE_INDICATOR_light.png b/...EssentialFeediOSTests/Feed UI/snapshots/FEED_WITH_LOAD_MORE_INDICATOR_light.png
diff --git a/EssentialFeed/EssentialFeediOSTests/Helpers/UIViewController+Snapshot.swift b/EssentialFeed/EssentialFeediOSTests/Helpers/UIViewController+Snapshot.swift
@@ -40,7 +40,9 @@ private final class SnapshotWindow: UIWindow {
 	private var configuration: SnapshotConfiguration = .iPhone(style: .light)
 
 	convenience init(configuration: SnapshotConfiguration, root: UIViewController) {
-		self.init(frame: CGRect(origin: .zero, size: configuration.size))
+		let dummyScene = (UIWindowScene.self as NSObject.Type).init() as! UIWindowScene
+		self.init(windowScene: dummyScene)
+		self.frame = CGRect(origin: .zero, size: configuration.size)
 		self.configuration = configuration
 		self.layoutMargins = configuration.layoutMargins
 		self.rootViewController = root

diff --git a/...lFeed/EssentialFeediOSTests/Image Comments UI/snapshots/IMAGE_COMMENTS_dark.png b/...lFeed/EssentialFeediOSTests/Image Comments UI/snapshots/IMAGE_COMMENTS_dark.png
diff --git a/...Feed/EssentialFeediOSTests/Image Comments UI/snapshots/IMAGE_COMMENTS_light.png b/...Feed/EssentialFeediOSTests/Image Comments UI/snapshots/IMAGE_COMMENTS_light.png
diff --git a/...Tests/Image Comments UI/snapshots/IMAGE_COMMENTS_light_extraExtraExtraLarge.png b/...Tests/Image Comments UI/snapshots/IMAGE_COMMENTS_light_extraExtraExtraLarge.png
diff --git a/EssentialFeed/EssentialFeediOSTests/Shared UI/snapshots/EMPTY_LIST_dark.png b/EssentialFeed/EssentialFeediOSTests/Shared UI/snapshots/EMPTY_LIST_dark.png
diff --git a/EssentialFeed/EssentialFeediOSTests/Shared UI/snapshots/EMPTY_LIST_light.png b/EssentialFeed/EssentialFeediOSTests/Shared UI/snapshots/EMPTY_LIST_light.png
diff --git a/...Feed/EssentialFeediOSTests/Shared UI/snapshots/LIST_WITH_ERROR_MESSAGE_dark.png b/...Feed/EssentialFeediOSTests/Shared UI/snapshots/LIST_WITH_ERROR_MESSAGE_dark.png
diff --git a/...eed/EssentialFeediOSTests/Shared UI/snapshots/LIST_WITH_ERROR_MESSAGE_light.png b/...eed/EssentialFeediOSTests/Shared UI/snapshots/LIST_WITH_ERROR_MESSAGE_light.png
diff --git a/...ests/Shared UI/snapshots/LIST_WITH_ERROR_MESSAGE_light_extraExtraExtraLarge.png b/...ests/Shared UI/snapshots/LIST_WITH_ERROR_MESSAGE_light_extraExtraExtraLarge.png