Currently Being ModeratedMay 2, 2013 3:08 PM (in response to robin286)
your post is not very clear. I beleive you are saying you used Software Update and installed 10.8.3 and now Mail does not work. Please confirm?
Currently Being ModeratedMay 2, 2013 3:35 PM (in response to rkaufmann87)
Yes, corrupt emil for OS 10.8.3 downloaded from Apple. Do not have C D or DVD to re-install. Need to re- install from Apple site
Currently Being ModeratedMay 2, 2013 3:57 PM (in response to robin286)
Your download or install was corrupted. Before you do ANYTHING backup your computer. Repeat before you do ANYTHING back up your computer. Then boot into the Restore partition and then reinstall OS X.