升級了Mac系統(tǒng)和Xcode12版本后澈蚌，運行iOS12摹芙、iOS13模擬器運行不起來，報如下錯誤：
Failed to start launchd_sim: could not bind to session, launchd_sim may have crashed or quit responding
Domain: com.apple.SimLaunchHostService.RequestError
Code: 4
解決方案一：
將 /usr/local/lib/libsafenet.dylib重命名宛瞄，比如改成/usr/local/lib/libsafenet1.dylib后浮禾，系統(tǒng)就不會被這個安全庫影響了，然后重啟電腦后就能運行iOS12份汗、iOS13系列模擬器了
解決方案二：
升級Mac系統(tǒng)盈电，升級成最新的Mac OS Big Sur 11.0.1版本后就自動可以了 參考
When running on older iOS Simulator, error “Failed to start launchd_sim: could not bind to session, launchd_sim may have crashed or quit responding”
