OS X El Capitan Public Beta 4 is Now Available

if [ ! -a /Volumes/EFI/* ]; then
	if [ -d /Volumes/EFI ]; then
		continue
	else
		mkdir /Volumes/EFI
	fi
else
	echo "Directory /Volumes/EFI already exists and is not empty."
	exit
fi

DEV=$(df -P / | tail -n 1 |  awk '/.*/ { print $1 }'| sed -E 's/s([0-9]+)/s1/' )
echo "Mounting EFI partition from $DEV"
mount -t msdos "$DEV" /Volumes/EFI
if sed -E -i _plist_backup '/CsrActiveConfig/,/string/ s/0x03/0x00/' /Volumes/EFI/EFI/CLOVER/config.plist; then
	echo "File editing and kext signing protection turned on."
	exit
elif sed -E -i _plist_backup '/CsrActiveConfig/,/string/ s/0x00/0x03/' /Volumes/EFI/EFI/CLOVER/config.plist; then
	echo "File editing and kext signing protection turned off."
	exit
else
	echo "Required strings not found in config.plist."
	exit
fi