My Macbook Pro 2011 i7 13' is up to date. I use a Kingston V100 SSD 256 GB. It's been two or three days that if I start iTunes for listening music or synchronize to iPhone I can't shut off the MacBook. It gets stucked in the blue screen with the spinning wheel. So I have to force shut down with the power button. I'm sure that is a iTunes issue because if I start the computer without iTunes, there is no problem. Is there any iTunes' background process that keeps the Mac on? I already update the programa (10.2.2) and made a new installation with no results. Any ideas?