Most software and hardware developers wait until after the new OS hits the streets before they finalize testing, so it takes a few weeks, and sometimes months, to release fully compatible versions. Depending on the context of your mix of applications, plug-ins, and hardware accessories, your mileage will vary in terms of which bugs you experience. Apple’s current annual release schedule means this has become a regular occurrence this time of year. Like our previous warnings, new software, including new operating systems, always have bugs, especially when first released. Unless you have some super urgent business need for some of the new features (and we don’t mean you want to geek out and play), hold back. Unfortunately upgrading is a contextual decision. There is a lot of great press about how MacOS Sierra offers improved performance, stability and new features. The easy answer is “eventually, but not yet.”