Macs are known to be pretty secure as they don't seem to get viruses and malware as easily as Windows computers do. But the truth is, no computer is completely immune to malicious software. So how can you tell if your Mac has been infected with malware? Look out for these signs.
Beware: Macs aren’t immune to malware
Keyboard shortcuts MAC users should know

Some Mac users have been using their devices for years and still do not know many of the keyboard shortcuts designed to make users’ lives easier. Here are some of the most helpful ones users like you should learn.
Minimize or dock the front app window: Command + M
If you have several open apps, browsers, and Finder windows, use this shortcut to minimize the front window to the Dock.
Are Macs immune to malware?
Protect your Mac from these threats
Keyboard shortcuts Mac users need to know
How secure are your Apple devices?
Protect your Mac from malware

Viruses and malware creators are out to attack anyone and everyone within their reach — including Mac users. Despite Apple’s insulated macOS layouts, cybercriminals are finding ways to identify and exploit vulnerabilities.
Viruses that affect Macs
There are four general virus types that hit Apple products, and their effects can range from merely annoying to downright destructive:
Adware
Adware are unwanted programs that bombard users with pop-up advertisements.