Can not install a Third party Plug-In Acrobat Reader DC
I am trying to open a secured PDF from TechStreet. It requires Adobe Acrobat Reader DC and a PlugIn. I am a Mac user. I have worked with TechStreet and they have walked me through everything. Unfortunately, I go to Preferences, General, Application Start Up and unclick the certified plug-in as required, but it continues to state that the certified mode is still on even though the it is clearly not checked. At this point TechStreet informed me to contact Adobe. I receive the following message every time I try to install:
“FileOpenInstaller-B987.pkg” can’t be opened because Apple cannot check it for malicious software.
This software needs to be updated. Contact the developer for more information.
I've shut down adobe. Restarted.
I've shut down the computer and restarted. Nothing seems to work. Can you help?
Thanks!
