599      iPhone_iPad_Mac_apple

page goes blank when scrolling

When I try to scroll down a page while in Safari,  the down arrow on the page barely moves and the page goes blank. If I push the arrow back to the top the page comes back.  I am unable to scroll down any pages.  On an iMac OS Sierra.  I haven't made any changes so I am assuming my poor old Mac is possessed ?  Linda

最後更新：2017-09-29 08:29:44

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