I am new to Mac and am having problems with my new Mac not shutting down automatically. When I try to close down it just keeps on with the small wheel turning I have to close down manually. Have I got a setting wrong. Also can't insert a disc into my dvd drive is this a setting or bad drive. I went back to local apple agent where I purchased and they told me it would take 2 months to fix as they have to send it away. I don't want to be without computer for two months