Really pissed off to be disconnect randomly on wifi with my brand new imac...in the same room my HP computer laptop works well not being disconnected. It is a pity to buy Apple, expensive DVD reader at the end... I moved from Windows to Apple for the first and the last time, Apple will never have any $ from me. Poor technical performances and bad services. They took the computer for 1 week, no replacement...ship it back to me and same issue. My friends are laughing at me and at Apple as well. Enough for me.