11 Replies Latest reply on Dec 7, 2018 1:17 PM by Jeff A Wright

    CS install file from unknown source?


      I have an older version of CS4 installed on my MacBook Pro. I understand that there are problems running some of the CS4 programs on OS Mojave, but Photoshop and Illustrator seem to work fine.


      For various reasons I am wanting to backup all my documents, then reinstall all my software. I was able to download the CS4 installation files from the Adobe.com website. However, when I tried to install, I got an error messages saying that the installation files are from an unknown source. So, how is it that files downloaded from Adobe are from an unknown source?


      Is there a way to work around this error message?


      Thanks for your help!