I'm trying to lean to use this mac pro that was given to me. I know ewww mac.. Lol
So I have mountain lion installed and I used a disk image from another mac to get el capitian running the issue is I cannot get the el capitian to use the entire hard drive it will not expand to the 500 gigs that is on the hdd. In disk utility it says 499.76 gb capacity and available is 220mb and I have used 16.1 8gb
If I go into partion on that hdd it has just 1 and it has the full 499 gb

Any ideas would be greatly appreciated