Crash upon security update Sierra 2017-001 31 October 2017
Hi I was updating my Macbook Pro with the latest security update 2017-001 for Sierra and now it hangs and has become unusable, same on an iMac and there was no issue. How do I resolve this ?
thanks
MacBook Pro (Retina, 13-inch, Late 2012), macOS Sierra (10.12.6)