bin/apple_ios_version

#!/bin/sh

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# outputs the highest level of iOS sdk installed
iOS_X_VERSIONS=$(xcodebuild -showsdks | sed -e '/./{H;$!d;}' -e 'x;/iOS SDKs/!d;' | grep -o '[0-9]*\.[0-9]* ');
echo $iOS_X_VERSIONS | tr " " "\n" | sort -g | tail -1;