下载链接如下，下完了放到～/Library/Caches/com.apple.dt.Xcode/Downloads目录下。

iOS 14.3

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK14_3-14.3.1.1611873653.dmg

iOS 14.2

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK14_2-14.2.1.1605311653.dmg

iOS 14.1

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK14_1-14.1.1.1604100028.dmg

iOS 14.0

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK14_0-14.0.1.1604100028.dmg

iOS 13.7

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK13_7-13.7.1.1599165590.dmg

iOS 13.6

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK13_6-13.6.1.1597276955.dmg

iOS 13.5

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK13_5-13.5.1.1591226335.dmg

iOS 13.4

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK13_4-13.4.1.1586370836.dmg

iOS 13.3

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK13_3-13.3.1.1580170331.dmg

iOS 13.2

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK13_2-13.2.1.1575590084.dmg

iOS 13.1

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK13_1-13.1.1.1571440502.dmg

iOS 13.0

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK13_0-13.0.1.1571440502.dmg

iOS 12.4

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK12_4-12.4.1.1568665771.dmg

iOS 12.2

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK12_2-12.2.1.1557987768.dmg

iOS 12.1

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK12_1-12.1.1.1543439531.dmg

iOS 12.0

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK12_0-12.0.1.1537588161.dmg

iOS 11.4

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK11_4-11.4.1.1527703358.dmg

iOS 11.3

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK11_3-11.3.1.1524350608.dmg

iOS 11.2

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK11_2-11.2.1.1516308624.dmg

iOS 11.1

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK11_1-11.1.1.1510784422.dmg

iOS 11.0

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK11_0-11.0.1.1508875951.dmg

iOS 10.3.1

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK10_3-10.3.1.1495751597.dmg

iOS 10.2

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK10_2-10.2.1.1484185528.dmg

iOS 10.1

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK10_1-10.1.1.1476902849.dmg

iOS 10.0

https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK10_0-10.0.1.1474488730.dmg

iOS 9.3

https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK9_3-9.3.1.1460411551.dmg

iOS 9.2

https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK9_2-9.2.1.1451951473.dmg

iOS 9.1

https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK9_1-9.1.1.1446593668.dmg

iOS 9.0

https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK9_0-9.0.1.1443554484.dmg

iOS 8.4

https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK8_4-8.4.1.1435785476.dmg

iOS 8.3

https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK8_3-8.3.1.1434581536.dmg

iOS 8.2

https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK8_2-8.2.1.1434581536.dmg

iOS 8.1

https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK8_1-8.1.1.1434581536.dmg