Managing Flash is even worse than it first appears.
Recent Safari updates now disable older versions of the Flash plugin. It wasn’t clear how “old” a version had to be to be disabled. Today I got an unwelcome surprise.
Most of our managed machines have Flash Player version 18.104.22.1687 installed. I was aware that version 22.214.171.1241 was available, but due to the issues here, I had not yet widely deployed it.
Today Adobe released Flash Player 11.4.402.265, and we started getting calls that Safari was blocking the Flash Plugin as out of date. Most of our users do not have admin rights, so we needed to fix it for them. I imported the Adobe Flash Player.pkg from the 126.96.36.1991 installer into Munki and tested an install on one machine. Flash was no longer blocked.
So I still don’t know exactly how old the Flash Player must be before Safari blocks it, but now we have to be even more proactive in keeping Flash up to date in our organizations.