Windows or Mac?
This site is primarily for Microsoft Windows operating systems. Why is that?
There is malware in the wild that targets the Apple operating systems. But the market share for Macs is in the lower digits and hackers are going to go for the lowest hanging fruit. And with the majority of personal computers, that is Windows. If you have a Mac, you may have heard that you do not need antivirus. But can it hurt? I run both, Windows and Mac, and have Malwarebytes installed on each.
The same security best practices apply to any computer and operating system, be it Ubuntu, Windows or iOS - do not fall for these types of scams!!!