Hello, I have a late 09 21" IMac and have a few problems.... 1. I do occasional maintenance with onyx and have been getting a few startup disk errors in recent months. These seem to get repaired and the computer still functions as normal. I have never had these before in 8 years of using osx so they do worry me. Is the osx boot drive just a bit corrupted? Would a simple reinstall help or is the hd showing signs of failure? 2. The trash simply refuses to empty. I've tried to bring the items back to the desktop and the folder they came from but they simply make a copy of them. I've tried the option key method and sudo rm -rf ~/.Trash + sudo rm -rf /Users/user_name/.Trash in the terminal but get no change Thanks for your time.