iMac: Update Fails Because Application Cannot Quit

I have an Epson printer and I had to reinstall my system software recently. Now I am trying to install the iMac Update but it continues to loop into a message asking me to quit other active applications. I continue to click OK but the message keeps coming up.
Note: When the system software is reinstalled, any necessary system updates must also be reinstalled.

The installer requires that no other application programs be open before the iMac Update can be installed. It is likely there have been additional attempts to print so that there are items in the Epson printer queue. The Epson Monitor application will continue to relaunch as long as items are waiting to be printed.

There is no quit option available from the Epson Monitor application. The printer documents are stored in the Spool folder of the Epson folder inside the Extensions folder. Clearing the Epson Monitor of all the documents waiting to be printed or actually deleting all the documents from the Spool folder would allow the Epson Monitor application to quit.

One possible procedure would be to restart the iMac with the extensions off. The Epson printer drivers are no longer active and the iMac Update software should now install as intended. Once the iMac is restarted, the printer queue should automatically start up, because of all the documents left in its queue. You should also close any open windows when in the Finder.

Please contact Epson if further assistance is required on removing items from the Epson Monitor.

Knowledge Base article 17159: "Locating Vendor Information" can help you search for a particular vendor's address and phone number.
Published Date: Feb 20, 2012