1. MAC OS HIGH SIERRA IS HERE:
Another year, another operating system. "Should I install it?" is the usual question. And despite the heap of misinformation that I hear on my rounds, the new systems are usually good, with one major caveat: Don't try putting a new system on an old Mac. It will slow down and run like treacle.
These new operating systems expect a recent-ish computer to function properly. If yours is pre-SSD, ie before solid-state-hard drives, then don't bother. Any Retina MacBook Pro, any MacBook Air and recent iMacs with a minimum of 8 GBs of RAM will be OK.
High Sierra has some terrific improvements to Photos amongst other goodies so have a look at this clip to find out: