Links to here http://support.apple.com/kb/HT6114 but nothing's on the page.
Edit: big update. 460M (I think), and took about 10 minutes on an Air.
[1] http://support.apple.com/kb/HT1222
Links to here http://support.apple.com/kb/HT6114 but nothing's on the page.
Edit: big update. 460M (I think), and took about 10 minutes on an Air.