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My Macbook Pro Screen flashes black once whenever I open my online banking browser. Is my mac being hacked every time this happens? What does this mean?

Whenever I am about to sign in to Natwest online banking my Macbook Pro with Retina Display flashes black once very quickly.


It's been happening for a few months now and it doesn't occur in any other situation or with any other website.

MacBook Pro with Retina display, macOS Sierra (10.12.6)

Posted on Nov 13, 2017 5:12 AM

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My Macbook Pro Screen flashes black once whenever I open my online banking browser. Is my mac being hacked every time this happens? What does this mean?

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