How can I use Acrobat 9 Pro with MAC High Sierra
I have Acrobat 9 Pro as part of CS4. I have recently upgraded my MacBook Pro, now operating on OS 10.13.4 High Sierra, and transferred all CS4 applications. All open and work - with the advice that they are not optimised for High Sierra - apart from Acrobat Pro. It asks me to enter my password to allow it make changes, then displays this:

but when I continue, nothing happens. Any thoughts?
