set aTargKey to "machine_name"
set aTargGenre to "SPHardwareDataType"

set macRes to getSystemProfileInAGenre(aTargGenre, aTargKey) of me
–>　　"MacBook Pro"

on getSystemProfileInAGenre(aTargGenre, aTargKey)
　　set sRes to do shell script ("/usr/sbin/system_profiler -xml " & aTargGenre)
　　set aSource to (my readPlistFromStr:sRes) as list
　　set aaList to contents of first item of aSource
　　
　　set aList to _items of aaList
　　repeat with i in aList
　　　　set aDict to (current application’s NSMutableDictionary’s dictionaryWithDictionary:(contents of i))
　　　　set aKeyList to (aDict’s allKeys()) as list
　　　　if aTargKey is in aKeyList then
　　　　　　set aRes to (aDict’s valueForKeyPath:aTargKey)
　　　　　　if aRes is not equal to missing value then
　　　　　　　　return aRes as string
　　　　　　end if
　　　　end if
　　end repeat
　　
　　return false
end getSystemProfileInAGenre

–stringのplistを読み込んでRecordに
on readPlistFromStr:theString
　　set aSource to current application’s NSString’s stringWithString:theString
　　set pListData to aSource’s dataUsingEncoding:(current application’s NSUTF8StringEncoding)
　　set aPlist to current application’s NSPropertyListSerialization’s propertyListFromData:pListData mutabilityOption:(current application’s NSPropertyListImmutable) |format|:(current application’s NSPropertyListFormat) errorDescription:(missing value)
　　return aPlist
end readPlistFromStr: