更新xcode Version 10.3 (10G8) 模拟器找不到并报错解决 2019-08-01

解决办法如下:

1、sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService

2、sudo xcode-select -s /Applications/Xcode.app/Contents/Developer

3、xcrun simctl erase all

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