chore: use correct SDK version for Xcode build (#25542)

chore: use correct SDK version for Xcode

.github/workflows/build-mobile.yml

@@ -178,9 +178,12 @@ jobs:
       contents: read
     # Run on main branch or workflow_dispatch, or on PRs/other branches (build only, no upload)
     if: ${{ !github.event.pull_request.head.repo.fork && fromJSON(needs.pre-job.outputs.should_run).mobile == true }}
-    runs-on: macos-latest
+    runs-on: macos-15
 
     steps:
+      - name: Select Xcode 26
+        run: sudo xcode-select -s /Applications/Xcode_26.2.app/Contents/Developer
+
       - name: Checkout code
         uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with: