I'm currently trying to modify the file, user/library/preferences/SystemConfiguration/com.apple.Boot.plist in order to enable the use of an apple usb external superdrive on my early 2009 iMac-- the internal drive is dying. When I open this file in Get Info, the permissions are, system read & write, admin read only, everyone read only. If I attempt to add owner, nick (Me), with read & write permissions, and then the repair permissions, I get this--
ACL found but not expected on “Library/Preferences/SystemConfiguration/com.apple.Boot.plist”
Apparently, it doesn't like having two users with read & write permissions, but system can't be removed from the permissions list.
In terminal, I can make the desire changes to the file, but it has no apparent effect-- i.e., the iMac still won't allow use of the external superdrive. The discs are read for a few seconds, and then ejected.
I'm guessing I have a problem with user permissions, but I have no idea how to fix it. Any suggestions?
I had Apple replace the superdrive with another unit, and it works just fine. So it was a hardware problem, not a permissions problem.