Mac Optimizer Virus Detector
The "Mac Optimizer" just came up and told me I had a virus on my Mac and to use this product to remove virus. It scanned my computer and found virus, then went on to sell me the software to remove.
Mac trademark was on the page. I want to know if this product is legitimate and how do I know for sure I have a virus? Or, is this company a scam?
MacBook Pro, OS X Yosemite (10.10.5)