Please let me know if you are referring to Flash Player or Flash Professional software.
Flash Player is a full and free software and nothing exists like trial version of it.
Flash Professional is a paid software and you can use the trial for 30 days.
I assume it's former that you are trying to install.
Please refer the KB Doc : http://helpx.adobe.com/flash-player/kb/installation-problems-flash-player-mac.html
I'm trying to install the basic FREE version of Adobe Flash, as I no longer am physically able to continue my work with all the Adobe software I still own. Being able to use the free version of Flash Player will help me continue to access my love of Adobe products and still help all my students. Thanks for the quick response.
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Have you tried the tried the toubleshooting steps mentioned in the KB Doc above ?
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