While Windows users often close down their PCs at the end of the day, those with Macs tend to leave them on indefinitely. Many Mac users engage in this behaviour because they want to pick up from where they left off, but also because experience has shown them that Macs tend to cope with this kind of behaviour – probably because Apple has designed macOS and Macs to be very efficient in terms of energy use and performance. But is this really a good idea? There are three options open to every user when they’ve finished using the computer for the day: leave it on, put it to sleep or turn it off. W…