This will eventually slow down the processing of an old MacBook. The latest Mac OS can be slightly heavy for the hardware. Certainly, you would have used it for a large number of tasks, and might even have loved its performance, but would you be able to reap the same performance if your MacBook ran the latest OS? You bought a MacBook in 2013 and have been using it since then. Well, the reason is Mac OS Sierra’s top features and seamless support. And even after its arrival, there still are a lot of people looking forward to download Mac OS Sierra 10.12 ISO and DMG. We are talking about Mac OS Big Sur 11.0.1. One question that may bug many users is that why is Mac OS Sierra 10.12 still so popular? And why not? In fact, the latest Mac OS version has already arrived the markets now. Here are a few highlights you should not miss in the event that you are a Mac OS sierra client. The general look and intrigue of the working framework underuse appeared to be the motivation behind why the end-clients cherished the working framework upon its discharge. The Mac OS sierra varied from its successors with progressive highlights that pulled the working framework into radical development in the market.