Q: printing - 'filter failed'

The only workaround I've found so far is to use a windows computer as a print server. So I've set up a windows PC with the correct windows driver, then shared it on the network, then set Yosemite to use this printer, specifying the earlier Mavericks print driver as the one to use. It's an ugly solution, but it worked for me, always assuming you have a PC lying around the place. Best I can suggest - sorry.

Hi SpaceDesign911 - actually, I already tried exactly those steps last week, and it didn't work. Reset the print system, specified the IP address, selected the Mavericks driver. No deal. Clearly some difference, either in the drivers or the way you went about it compared to me. Did you restart the machine during this process?

Thanks Paulo! Now, if I can just figure out how to print your instructions ...

By the way, there was a post from iKokie which specified how to switch off the sandboxing to make this work. These posts have been deleted, presumably by Apple, but they didn't specify why which is pretty annoying. I suppose they don't like their new security being compromised, and obviously we are not adult enough to decide for ourselves (I'm 52, btw, and been coding since I was 18...)

Thanks Paulo. Still not sure why these earlier posts on this thread got deleted, without a link elsewhere. 

Ok, so I tried relaxing the sandboxing as per the link you shared. It works. So my issue with the iSensys LBP5360 is now resolved. Thanks to everyone who contributed!

I feel your pain...

:-(

Thanks for the update, John...