xserve2009
Re:Hidden backdoor API to root privileges in Apple OS X
on Thursday April 09, 2015 @06:37PM (#9351493)
Early 2009 X-Serve?
It has a quad-core Xeon processor.
[update]
I am wrong. It is the late 2008 X-Serve that won't upgrade ...
Specs: https://support.apple.com/kb/SP10?locale=en_US
Supported H/W:
iMac (Mid 2007 or newer)
MacBook (Late 2008 Aluminum, or Early 2009 or newer)
MacBook Pro (Mid/Late 2007 or newer)
MacBook Air (Late 2008 or newer)
Mac mini (Early 2009 or newer)
Mac Pro (Early 2008 or newer)
Xserve (Early 2009)
from https://www.apple.com/osx/how-to-upgrade/