It's very good advice based on the history of problems that various people have posted; however it happened to me by accident last month on the Mavericks section of my computer, because in Mavericks the way the Apple Update notification box appears in the upper right corner of the display, it is not so straightforward to see what is included in the update. The contents don't show and there is no link to click for opening the details as there is in Snow Leopard; however, I discovered if I click on the update notification itself, it opens access to the contents of the updates. The time before I hit on this, I clicked Install and then found out that the Epson update got installed. Fortunately, however, it had no impact whatsoever on the functioning of my Stylus Pro 4900. However, I think it made a mess of how Acrobat prints to my Epson Workforce Multifunction machine, so I shall have to go to the Epson site and replace the driver with the real thing. It's all very strange - not clear why Apple would be installing something other than Epson's own drivers for its own products.