Can't Shutdown iMac

i have 2011 imac , when go shut off screen turns grey stays that, (10.7.2, 500gb hdd)

 

does repeat same issue once reboot?

 

Forums Macs Desktops iMac

• iPhone
• Mac OS & System Software
• iPad
• Apple Watch
• Notebooks
• iTunes
• Apple ID
• iCloud
• Desktop Computers
• Apple Music
• Professional Applications
• iPod
• iWork
• Apple TV
• iLife
• Wireless