Which browser you are using and what is the name of the file that you are trying to install ?
What is the error its displaying when you are trying to open the installer ? Please post a screenshot of the error using The specified item was not found.
I am using Safari.
I go to the Adobe web site, then download the latest Flash Player for Mac/Safari.
The file below appears in my Download File.
I am then unable to open the download and proceed. I get no error message.
Please post the complete name of the file which you are unable to open.
Problem fixed. Thanks
Sent from my iPad