El Capitan loaded and running, but does not restart after it turns off

I just downloaded El Capitan and installed on my iMac which was under Snow Leopard 10.6.8. There are 12 GB ram, and this is a 2009 end clocked at 3.06 Ghz version. The installation went well and it ran OK, everything seemed normal.  The problem came when I close shot tried to start again.  The Apple logo appears, and the progress bar goes about 2/3 of the way and hangs up.  I tried to reboot several times with the same results.

Try to start safe mode and then restart try safe mode if your Mac does not end commissioning - Apple supportnormally

Tags: Mac OS & System Software

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