No sighted help required. Shut down your Mac and then restart it while holding 
down CMD+r as it chimes. Wait a few seconds, then let go. Wait a bit longer and 
press CMD+F5. You can access disk utility from here with Fred. Fred will walk 
you through a disk erase, then an OS reinstall. 

--
Buddy Brannan, KB5ELV - Erie, PA
Phone: 814-860-3194 
Mobile: 814-431-0962
Email: bu...@brannan.name




> On Jul 6, 2015, at 8:44 AM, 'onlineeagle' via MacVisionaries 
> <macvisionaries@googlegroups.com> wrote:
> 
> Hi, I've managed to do something stupid with read write permitions and now my 
> mac is running rediculously slow. I've tried repairin permitions but that 
> hasn't helped. I think it might be a good idea for a format anyway, so I was 
> wondering whether it is possible to do this without sighted help, or am I 
> going to have to call in the eyes on this one?
> 
> Thanks.Sent from my iPhone
> 
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