iMac TERRIBLY SLOW!
My iMac has always been slow but now it's become even worse and ‘Beach balling’ a lot. I use a VirginMedia cable for all my internet requirements and the Mac is impossibly slow to let me into my VM account. I've spent a LONG time talking to one of their advisers and she agreed about the slowness and they have promised to contact me again tomorrow. Meanwhile, I thought it might be worth trying within the community to see if there is anyone out there with an idea of what the problem is. Any suggestions as to how I can get the Mac to run faster would be much appreciated.
iMac (27-inch, Late 2012), macOS Sierra (10.12.4)