iMac 2009 - mac os x 10.11.6 el capitan
when I last started up there was a white circle with a diagonal line thru before the apple logo then again after the apple logo and then it just did the usual startup.
i have not seen this before.
and do not know what it is.
any advice would be appreciated.
Edited by itsmesunny, 27 April 2017 - 10:01 AM.