Hi everyone, was wondering if you might be able to help me try and figure out why my iMac keeps freezing. My specs are: 12.5 inch, mid-2010 iMac, 3.06 GHz Intel Core i3, 4 GB 1333 MHz DDR3, ATI Radeon HD 4670 256 MB, 500 GB SATA Disk HD with 229GB free. I've noticed, especially since upgrading to El Capitan, although it did happen very occasionally on previous OS X versions, that every so often my computer will completely freeze. I can't open the force quit menu, open mission control, or move my mouse. Even the time freezes. It's becoming very regular now, at least once a week. But it only tends to happen when I have Safari open and am reading the web. I can never recall it happening whilst working with any other piece of software. If there is genuinely something wrong with my computer then I'd be happy to consider buying a more up-to-date machine, but if Safari turns out to be the problem, I don't want to risk buying another Mac in case I have the same problems on a much more expensive machine.