After doing the permissions and installing, all seemed fine - internet etc until I tried to print something. Nothing happened.

Went to delete my printers and add again, waited for Printer Setup Utility to start and nothing - just freezes. So force quit. Nothing. Again and again and again. Nothing. Restarted machine and it started up then closed down and started up again (keeps on doing it everytime you start it up now).

Tried to open Printer Setup utility from the apps folder and get an error -600.

So, it appears I can use Indesign etc (handy as a designer) but unfortunately cannot print to anything at all (very, very bad as a printing company).

First time I've had a bad experience with an update so I mustn't grumble - but I am because my business has ground to a halt until I (or Apple preferably) can sort it out.