xcode 无法启动设备，因为它无法位于磁盘上
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Unable to boot device because it cannot be located on disk
提问by Milan Jansen
The device's data is no longer present at /Users/[user name]/Library/Developer/CoreSimulator/Devices/D651BCC7-29FD-4B91-82F6-E255E856EA2F/data.
设备的数据不再存在于/Users/[user name]/Library/Developer/CoreSimulator/Devices/D651BCC7-29FD-4B91-82F6-E255E856EA2F/data。
I uninstalled xcode 9 and installed xcode 9.1, but when run project, following message was shown:
我卸载了 xcode 9 并安装了 xcode 9.1，但是在运行项目时，显示以下消息：
Unable to boot device because it cannot be located on disk. The device's data is no longer present at /Users/[user name]/Library/Developer/CoreSimulator/Devices/D651BCC7-29FD-4B91-82F6-E255E856EA2F/data.
无法启动设备，因为它无法位于磁盘上。设备的数据不再存在于 /Users/[user name]/Library/Developer/CoreSimulator/Devices/D651BCC7-29FD-4B91-82F6-E255E856EA2F/data。
I found "Developer" folder, but cannot find "CoreSimulator" folder.
我找到了“Developer”文件夹，但找不到“CoreSimulator”文件夹。
回答by Tomá? Linhart
I was able to resolve the issue running xcrun simctl erase allin Terminal.
我能够解决xcrun simctl erase all在终端中运行的问题。
回答by IKKA
Quit Xcode.app, Simulator.app, etc
退出 Xcode.app、Simulator.app 等
Try the follwing commands in terminal
在终端中尝试以下命令
sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService
须藤 killall -9 com.apple.CoreSimulator.CoreSimulatorService
rm -rf ~/Library/*/CoreSimulator
rm -rf ~/Library/*/CoreSimulator
回答by Itachi
Go to Xcode menu Window-> Devices and Simulators-> Simulatorstab, right-click the bad simulator and choose Deletefrom the menu list, then add it back from the left bottom entry again, it works!
转到 Xcode 菜单Window-> Devices and Simulators->Simulators选项卡，右键单击坏模拟器并Delete从菜单列表中选择，然后再次从左下角条目添加回来，它可以工作！
回答by Nick Meehan
Click on the simulators dropdown at the top of Xcode, and select Download Simulators....
单击 Xcode 顶部的模拟器下拉菜单，然后选择Download Simulators....
From here, you can select which versions you want to download and for what devices.
从这里，您可以选择要下载的版本以及适用于哪些设备。
