$ /usr/sbin/system_profiler SPSoftwareDataType
Software:
System Software Overview:
System Version: Mac OS X 10.5.8 (9L31a)
Kernel Version: Darwin 9.8.0
Boot Volume: Macintosh HD
Boot Mode: Normal
Computer Name: tom’s MacBook Pro
User Name: fred (fred)
Time since boot: 21 days 10:00
