例如 Xcode 10.x 就無法將軟體裝到 iOS 13 進行測試/除錯
會出現類似警告訊息：
This iPhone XS Max is running iOS 13.0 (17A5492t), which may not be supported by this version of Xcode.
解決方式：
安裝最新的 Xcode
再從新版本的 Xcode 複製 Device Support 檔案 到 舊Xcode 中
開終端機
查看 Xcode 10.3 有哪些 Device Support $ ls -l /Applications/Xcode10.3.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/ total 0 drwxrwxr-x 4 fire admin 128 7 11 23:27 10.0 drwxrwxr-x 4 fire admin 128 7 11 23:27 10.1 drwxrwxr-x 4 fire admin 128 7 11 23:27 10.2 drwxrwxr-x 4 fire admin 128 7 11 23:27 10.3 drwxrwxr-x 4 fire admin 128 7 11 23:27 11.0 drwxrwxr-x 4 fire admin 128 7 11 23:27 11.1 drwxrwxr-x 4 fire admin 128 7 11 23:27 11.2 drwxrwxr-x 4 fire admin 128 7 11 23:27 11.3 drwxrwxr-x 4 fire admin 128 7 11 23:27 11.4 drwxrwxr-x 4 fire admin 128 7 11 23:27 12.0 drwxrwxr-x 4 fire admin 128 7 11 23:27 12.1 drwxrwxr-x 4 fire admin 128 7 11 23:27 12.2 drwxrwxr-x 4 fire admin 128 7 11 23:27 12.3 drwxrwxr-x 4 fire admin 128 7 11 23:27 8.0 drwxrwxr-x 4 fire admin 128 7 11 23:27 8.1 drwxrwxr-x 4 fire admin 128 7 11 23:27 8.2 drwxrwxr-x 4 fire admin 128 7 13 13:11 8.3 drwxrwxr-x 4 fire admin 128 7 11 23:27 8.4 drwxrwxr-x 4 fire admin 128 7 11 23:27 9.0 drwxrwxr-x 4 fire admin 128 7 11 23:27 9.1 drwxrwxr-x 4 fire admin 128 7 11 23:27 9.2 :: ::
cp -r /Applications/Xcode11.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/13.0 \
/Applications/Xcode10.3.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport
** 注意 /Applications/Xcode11.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/13.0 的最後面
不要加斜線
另外，有好心人整理好各版本 Device Support file
https://github.com/iGhibli/iOS-DeviceSupport/tree/master/DeviceSupport
