Avoid Plugging Untrusted Devices Into Your Mac
You probably don’t plug in many external devices into your Mac, but it’s best if you avoid using one that’s not yours or from someone you don’t trust. There’s always the possibility that an iPhone, an external hard drive, or any other device can carry malicious software without anyone even knowing about it. If you have an antivirus, it’s possible that the app will detect it as soon as you plug it in, but it’s best to avoid this situation in the first place. Of course, if you need to plug it in, make sure to scan your computer afterward.