舊裝置升級iOS 9會卡住變磚塊，蘋果提供解決方法
有許多iOS裝置用戶抱怨，當他們升級到一半時，螢幕上出現「滑動以升級」（Slide to Upgrade）的畫面之後就卡住了，依指示滑動卻無回應。包括iPhone、iPad或iPod touch用戶都曾遭遇此一問題。
蘋果並沒有說明更新卡住的原因，但提供了解決方案。先將iOS裝置連結電腦，並執行iTunes，選擇裝置後再恢復原本儲存於iTunes的備份。如果先前沒有備份，此時亦能直接進行備份。
若在回復備份後仍然看到「滑動以升級」的畫面，就得選擇回復使用者的裝置，然後將該裝置設為新裝置。
蘋果亦未透露有哪些裝置會遇到上述狀況，但有媒體指出，升級至iOS 9出現卡住情況的通常是舊機種。
If the Slide to Upgrade screen won't go away after you update to iOS 9
When the Slide to Upgrade screen doesn't respond, find out what to do.
Use these steps:
- Connect your iOS device to a computer that you've previously synced with iTunes. Then make sure iTunes is open.
- Select your device. If you don't see it listed, force restart your device by pressing and holding both the Sleep/Wake and Home button for at least 10 seconds, until you see the Apple logo.
- If you made an iTunes backup of your device before updating to iOS 9, restore your device from that backup. If not, you need to make a backup of your device in iTunes, then restore from that backup.
If you still see the Slide to Upgrade screen after completing the steps above:
- Restore your device. If you don't see your device in iTunes, or your computer won't trust your device, press and hold both the Sleep/Wake and Home button for at least 10 seconds, until your device restarts and appears in iTunes. When prompted, choose Restore.
- After the restore is complete, set up your device as new.
This will be resolved soon in an upcoming iOS update.
「藤崎」的iPad2與iPhone 4S已經升級到iOS 9了！而且什麼問題都沒有！
