simreset.sh

#!/bin/bash

UUID_REGEX='s/^.*\([0-9A-Z]\{8\}-[0-9A-Z]\{4\}-[0-9A-Z]\{4\}-[0-9A-Z]\{4\}-[0-9A-Z]\{12\}\).*$/\1/p'

xcrun simctl shutdown all
xcrun simctl delete  unavailable
xcrun simctl list devices | sed -n $UUID_REGEX | xargs -I {} xcrun simctl erase "{}"
xcrun simctl list devices | sed -n $UUID_REGEX | xargs -I {} xcrun simctl delete "{}"
rm -fr "$HOME"/Library/Developer/CoreSimulator/Devices/*

cat << EOF > "$HOME/Library/Developer/CoreSimulator/Devices/device_set.plist"
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
    <dict>
        <key>DefaultDevices</key>
        <dict>
        </dict>
        <key>DevicePairs</key>
        <dict/>
        <key>Version</key>
        <integer>0</integer>
    </dict>
    </plist>
EOF

LATEST_IPHONE=`xcrun simctl list devicetypes | sed -n 's/^iPhone.*(\(com.*\))$/\1/p' | tail -n 1`
LATEST_IOS=`xcrun simctl list runtimes | sed -n 's/^iOS.*\(com.*\)$/\1/p'`
xcrun simctl create "Latest iPhone" "$LATEST_IPHONE" "$LATEST_IOS"

xcrun simctl create "iPhone 8 Plus" "com.apple.CoreSimulator.SimDeviceType.iPhone-8-Plus" "$LATEST_IOS"


xcrun simctl list devices

simreset2.sh

#!/bin/bash

UUID_REGEX='s/^.*\([0-9A-Z]\{8\}-[0-9A-Z]\{4\}-[0-9A-Z]\{4\}-[0-9A-Z]\{4\}-[0-9A-Z]\{12\}\).*$/\1/p'

sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService

xcrun simctl shutdown all
xcrun simctl delete  unavailable
xcrun simctl list devices | sed -n $UUID_REGEX | xargs -I uuid xcrun simctl delete "uuid"

LATEST_IPHONE=`xcrun simctl list devicetypes | sed -n 's/^iPhone.*(\(com.*\))$/\1/p' | tail -n 1`
LATEST_IOS=`xcrun simctl list runtimes | sed -n 's/^iOS.*\(com.*\)$/\1/p'`
xcrun simctl create "Latest iPhone" "$LATEST_IPHONE" "$LATEST_IOS"

xcrun simctl list devices