I have seen cases where the software KNOWS what version of OS is installed even though the systemversion.plist is GONE,
Cases? (plural), really? How would that situation even arise? [what would ever make that particular file go away?]
for example
But okay, using this as a starting point...
$ sysctl -n kern.osversion
10K549
... i then ran this command:
[font:Courier]
$ sudo grep -F -l -r 10K549 /System/Library /private/{etc,var/[^v]*} 2>/dev/null
Although build number is occasionally referenced, it seems to go more on the actual version number ("10.5.8" etc)
