The short answer: Yes.
MacOS boasts impressive security features. But it isn’t completely airtight. Your online activity can still be seen by your ISP, surveillance agencies, and even hackers. A VPN provides you with end-to-end encryption that ensures you leave no trail of information as you surf the internet.
When you browse with a VPN, you access the internet through a secure tunnel. This blocks out every other person from seeing the websites you visit or the information you deposit online. This is particularly important if you wish to torrent anonymously on your Mac device.
A VPN also provides you with secure access to geo-blocked websites. This is critical for streaming geo-blocked content on your device. By connecting to a server in the locality of your desired content, you trick the website into thinking you’re in that location. This is why VPNs successfully unblock services like BBC iPlayer, Hulu, and Netflix.