以下是解决此问题的步骤-

open terminal on your mac type cd.. 2 times Now go to /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs Now type ls, you will find sdk's here. Fir iPhone, you should see iPhoneOS.sdk. copy this path as /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk now reopen the terminal and type export SDKROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk now this error should be removed and your devices should be now recognised by system

在Xcode中，打开顶部的Xcode菜单，然后选择Preferences…，然后选择Locations选项卡。

如果你对命令行“方法”感兴趣，请尝试:installer -pkg /Applications/Xcode.app/Contents/Resources/Packages/XcodeSystemResources。PKG -target /。另外，请确保Xcode -select -s选择了正确的Xcode安装路径。

选择Xcode首选项，然后选择位置选项卡，然后进入命令行工具下拉框，选择一个。

问题解决了!

仅供参考: 我在Xcode 12.3中尝试了这个方法

在首选项中添加xcode ->位置工作正常

以下是解决此问题的步骤-

open terminal on your mac type cd.. 2 times Now go to /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs Now type ls, you will find sdk's here. Fir iPhone, you should see iPhoneOS.sdk. copy this path as /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk now reopen the terminal and type export SDKROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk now this error should be removed and your devices should be now recognised by system