when I try to install adobe flash player on my Mac OS X El Capitan 10.11.3 I get to the point of putting the username and password in and the box just shakes and won't go any further

Hi,

This is the operating system prompting for your computer's user and ID an password.  Please see What userid & password do I need to install Flash Player? for more information.

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Maria

Hi, have you checked the speed of you processor? In the Requirements of the systems it is said to require dual core 1.8ghz. or faster. Does you Mac have an equal or faster processor?

Please download it from below location:

get.adobe.com/flashplayer/