I was trying to install Adobe CS5 in my Imac 2011 – running High Sierra. When i clicked on the installation icon, i always got “install” can’t be opened. you should eject the disk image.” , i verified my security setting, there is nothing blocked there.
This is the error i got:
Root cause: it’s something with Apple certificate expiration. It revokes Adobe from installing correctly.
This is how i fixed
Open “Terminal” app and run 2 commands below:
cd /Volumes/Adobe\ Photoshop\ CS5/Adobe\ Photoshop\ CS5/Install.app/Contents/MacOS/
install
