Webroot and iOSX

Hi dschump
 
Welcome to the Community Forums.
 
I do not know about the Best Buy version of WSA but I believe that the Webroot version is compliant with that version of the Mac OS.  This is from the Webroot site for the WSA Antivirus version:
 
PC & MacOperating Systems

• Microsoft® Windows® XP 32- and 64-bit SP2, SP3
• Windows Vista® 32-bit (all Editions), Windows Vista SP1, SP2 32- and 64-bit (all Editions)
• Windows 7 32- and 64-bit (all Editions), Windows 7 SP1 32- and 64-bit (all Editions)
• Windows 8 32-and 64-bit
• Windows 8.1 32-and 64-bit
• Mac OS® X v.10.7.3 “Lion”
• Mac OS X v. 10.8 "Mountain Lion"
• Mac OS X v. 10.9 "Mavericks"
• Mac OS X v.10.10 "Yosemite"

So perhaps the Best Buy version is not up to the same level as the Webroot version. Please see this link for the Webroot WSA versions, licensing options & pricing.
 
I hope that helps?
 
Regards, Baldrick