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Downloads the latest Google Chrome DMG file and installs it on a Mac
volname="Google Chrome"
/bin/echo "--" >> ${logfile}
/bin/echo "`date`: Downloading latest version." >> ${logfile}
/usr/bin/curl -s -o /tmp/${dmgfile} ${url}
/bin/echo "`date`: Mounting installer disk image." >> ${logfile}
/usr/bin/hdiutil attach /tmp/${dmgfile} -nobrowse -quiet
/bin/echo "`date`: Installing..." >> ${logfile}
ditto -rsrc "/Volumes/${volname}/Google" "/Applications/Google"
/bin/sleep 10
/bin/echo "`date`: Unmounting installer disk image." >> ${logfile}
/usr/bin/hdiutil detach $(/bin/df | /usr/bin/grep "${volname}" | awk '{print $1}') -quiet
/bin/sleep 10
/bin/echo "`date`: Deleting disk image." >> ${logfile}
/bin/rm /tmp/"${dmgfile}"
exit 0
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