Macs are inherently more secure but these step will added advantage to keep your Mac protected from virus or malware attacks.

1. Simple Steps to
Protect Your Mac OS

2. It’s true that malware is less common on
Macs than on Windows or Android. But that
doesn’t mean Macs are inherently more
secure, or that Mac users should take their
security for granted.

3. Remove Java from your Mac
unless you absolutely need it
Mac OS faces a vulnerability in Java. If you
can’t eliminate Java completely, at least turn
it off in your browser, where Java threats are
looming.

4. Keep your software patched
with up-to-date security fixes
Hackers find plenty of victims by exploiting
known vulnerabilities that could have been
halted by a security patch.

5. Set GateKeeper to only run
digitally-signed apps
Apple is very good at keeping malicious
apps out of its stores for Mac and iOS apps
(iPhones, iPads).

6. Use system restore software
for protecting configuration
It protects system by Freezing the desired
configuration set by you.
More info.

7. Run antivirus software on
your Macs
Its always better to have an updated version
of an Anti-virus software to protect Mac OS
from virus or malware attack.