tywebb13 - THANK YOU for the links
I had the "software update is needed ..." problem for a half year now, which was, thanks to Your links now solved - I don't know why, but this update didn't show up, maybe it has something to do with my Appstore settings (i am on El Capitan and my account is set to my country), but everything works now fine

on my reaaaly old but reliable workhorse (MBP 15" Late 2007, "slightly upgraded" :-D)
So Again - THANK YOU - i was not able to find links to the .pkg files before.