> purchased Kaspersky antivirus for Mac
You might have purchased Kapersky antivirus for Mac, but what you're trying to install is the Windows version of the app.
Generally antivirus apps are not needed nor recommended on Mac since there are many other safeguards in place against installing malware. Social engineering hacks are still an issue, but most antivirus apps don't protect against those.
If you're sure you want to install this, check your download link and make sure you download/install the Mac version of the app and not the Windows version.