Macworld If you spend any time online, there’s a good chance that at some point you’ll encounter adverts for VPN services that offer to keep your data and activities while on the web safe and secure. But is this really the case and should you add VPN software to your Mac? We explain what a VPN is and whether it’s safe to use on your Mac. We also look at whether it can slow down your web connection and drain your battery. Another reason people are concerned about using a VPN is the question of whether it is legal to use a VPN. With so many wanting to use a VPN so that they can view content that…