got msg supposedly from Mac support saying I have been infected with malware/adware and to call a number ASAP
All of a sudden a msg appeared on my computer saying it was from Mac support and that I had been infected with malware/adware. I was told to call a number (landline in Hawaii!) ASAP. There was even a recorded message saying the same thing.
MacBook Pro (15-inch Mid 2010), OS X Yosemite (10.10.5)