Will Mac OS catch malware Popdeals

I have a computer with Windows 7 system and Mac OS. I suddenly find Popdeals add-on on my Chrome browser in Windows. After some searches, I found this post to figure it out. But what I worry about is that I've shared a file with Mac OS before I take the removal action. Now the question is what I should do to stop the malware to affect my Mac. Thanks for any input!