diff --git a/.github/workflows/sdk.auth.yml b/.github/workflows/sdk.auth.yml
index 1f1c690157d..1e10683ec6a 100644
--- a/.github/workflows/sdk.auth.yml
+++ b/.github/workflows/sdk.auth.yml
@@ -86,6 +86,13 @@ jobs:
           FirebaseAuth/Tests/SampleSwift/SwiftApiTests/Credentials.swift "$plist_secret"
     - name: Xcode
       run: sudo xcode-select -s /Applications/Xcode_16.4.app/Contents/Developer
+    - name: Install simulators in case they are missing.
+      uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3
+      with:
+        timeout_minutes: 15
+        max_attempts: 5
+        retry_wait_seconds: 120
+        command: sudo xcodebuild -downloadPlatform iOS
     - uses: nick-fields/retry@ce71cc2ab81d554ebbe88c79ab5975992d79ba08 # v3
       with:
         timeout_minutes: 15