[Skullmeat]

Should I require an antivirus

Any protection Is better than none.

Malware and the like, has become rather common for the Mac OS compared to 5+ years ago. You can opt for Norton, ESET, Avast or Kaspersky. I also suggest Installing Malwarebytes- which can run alongside any AV without compatibility Issues.

Common enough I belive they have removed the bit about mac not getting viruses from some of thier marketing material. Dont quote me on that tho.