diff --git a/.github/workflows/ios-beta.yaml b/.github/workflows/ios-beta.yaml
index 656d9cb51b..321142ccc5 100644
--- a/.github/workflows/ios-beta.yaml
+++ b/.github/workflows/ios-beta.yaml
@@ -33,9 +33,9 @@ on:
 jobs:
   ios-beta:
     name: Apple TestFlight
-    runs-on: macos-14
+    runs-on: macos-15
     env:
-      DEVELOPER_DIR: /Applications/Xcode_15.4.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_16.app/Contents/Developer
       LANG: en_US.UTF-8  # Fastlane complains that the terminal is using ASCII.
       LANGUAGE: en_US.UTF-8
       LC_ALL: en_US.UTF-8
diff --git a/.github/workflows/ios-check.yaml b/.github/workflows/ios-check.yaml
index 6da28fc534..d91674f209 100644
--- a/.github/workflows/ios-check.yaml
+++ b/.github/workflows/ios-check.yaml
@@ -35,9 +35,9 @@ on:
 jobs:
   ios-check:
     name: Build iOS
-    runs-on: macos-14
+    runs-on: macos-15
     env:
-      DEVELOPER_DIR: /Applications/Xcode_15.4.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_16.app/Contents/Developer
       LANG: en_US.UTF-8  # Fastlane complains that the terminal is using ASCII.
       LANGUAGE: en_US.UTF-8
       LC_ALL: en_US.UTF-8
@@ -78,7 +78,7 @@ jobs:
             -scheme OMaps \
             -configuration Debug \
             -sdk iphonesimulator \
-            -destination 'platform=iOS Simulator,name=iPhone 15,OS=latest' \
+            -destination 'platform=iOS Simulator,name=iPhone 16 Pro Max,OS=latest' \
             -quiet \
             -resultBundlePath ${{ env.TEST_RESULTS_BUNDLE_NAME }}.xcresult \
             CODE_SIGNING_REQUIRED=NO \
diff --git a/.github/workflows/ios-release.yaml b/.github/workflows/ios-release.yaml
index ac808aae31..6b698a53d8 100644
--- a/.github/workflows/ios-release.yaml
+++ b/.github/workflows/ios-release.yaml
@@ -5,9 +5,9 @@ on:
 jobs:
   ios-release:
     name: iOS Release
-    runs-on: macos-14
+    runs-on: macos-15
     env:
-      DEVELOPER_DIR: /Applications/Xcode_15.4.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_16.app/Contents/Developer
       LANG: en_US.UTF-8  # Fastlane complains that the terminal is using ASCII.
       LANGUAGE: en_US.UTF-8
       LC_ALL: en_US.UTF-8
diff --git a/.github/workflows/macos-check.yaml b/.github/workflows/macos-check.yaml
index c552c8088d..caacce95c4 100644
--- a/.github/workflows/macos-check.yaml
+++ b/.github/workflows/macos-check.yaml
@@ -30,9 +30,9 @@ on:
 jobs:
   macos-matrix:
     name: macOS builds and tests
-    runs-on: macos-14
+    runs-on: macos-15
     env:
-      DEVELOPER_DIR: /Applications/Xcode_15.4.app/Contents/Developer
+      DEVELOPER_DIR: /Applications/Xcode_16.app/Contents/Developer
       HOMEBREW_NO_ANALYTICS: 1
       HOMEBREW_NO_INSTALL_CLEANUP: 1
     strategy: