Q: Do I need virus protection on my Macbook Pro? OS X Yosemite, 10.10.5?

No. There are no viruses at the present time. If you upgrade OS X then you also upgrade the anti-malware software built-in to OS X. Save your money and your computer. If you become inundated with adware in email and your browser, then see:

Fixes for Adware and Pop-ups:

1. Malwarebytes
2. DetectX 2.11
3. Remove adware that displays pop-up ads and graphics on your Mac
4. Stop pop-up ads and adware in Safari - Apple Support

Antivirus software is only needed if you or she is concerned about Windows malware; otherwise, use common sense and install all of Apple's security updates.

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