received message saying my MAC had been infected and credit card numbers etc had been taken - and to phone this number immediately to talk to Mac support to fix. IT IS NOT THE MAC SUPPORT NUMBER

1800 954 287 : Re-routed numbers to a nasty and sophisticated call centre based in India that pretends to be working as or for Microsoft support team.( Apple computers are an easy target). They are FAKE, FAKE, FAKE. Those scums are installing malwares and viruses from popups or with bundles software as Adobe Flash. More
importantly, Adult sites are 98% to be found as their favourite way of passing their viruses (eg: " DepFile " as host files). Your internet browser suddenly freeze
and your computer is being frozen. Best way is to shut your computer down ( by pressing power button for 20-30 to seconds ...or, Press ESC continuously for 10-15
seconds ...or to make sure, unplug Your computer). Fear and stress will take over with messages saying that your computer has had a virus attack. Restart with a
clean browser cache and a run of a antivirus if you have one. Talk to someone (to your local computer guy) if you are not reassured or still in distress.This is a free phone call number, that’s targeting Australian audience. Note that nothing has changed in your computer system but check if some extensions had been added to
your browser.If you do a lot of surfing the net, always run Task Manager that can stop any further damage. Do not let those curry scumbags win.
CALL YOUR BANK, CANCEL YOUR TRANSACTION.
https://discussions.apple.com/docs/DOC-8771