Hold For Authentication on Mac.

[adamsund]

We had a problem with printing from iMacs a little while ago. Seemed to be very random where some machines would just not print. Spent hours on it, delving into CUPS and getting professional help in but to no avail. Then I suddenly had a eureka moment when I realised the problem workstations all had Impero on. Uninstalling it fixed the issue instantly. Seems to be quite common now, whenever there's an issue, look to the badly managed Impero!