sonnykeyes

THANK YOU SO MUCH. That was it. It didn't occur to me that the 1/4" had to be connected too - works perfectly now. Thanks again!

Arrrgggghh! I feel like I'm so close now. I successfully used mundofer's tip for installing Workbench, but the first step running it is to set everything up using Line 6 Monkey, and that, I'm afraid, does nothing but bounce in the dock for a minute, then stop and sit there. No windows. No setup. No options. WTH? Anyone have Monkey running properly in Yosemite? ***EDIT: OK now I've got Monkey running, (I had to remove the AVID Core Audio plugin, if anyone's interested) and everything's up-to-date. Monkey sees the Line 6 USB interface, but Workbench won't see it or the V300. Frustration level is Expert. ***EDIT2: I just noticed that the USB interface is flashing red on the guitar side no matter how much I change batteries and wiggle the cables. I guess sometimes chasing an old technology is just a waste of time and money.

Thanks, Art, but nope; installing Java didn't fool the Installer into realizing that OS 10.10 actually is higher than 10.5. Anyone have another idea?

So I'm guessing from the posts here that if you already had Workbench installed when you upgraded to Yosemite, it still works, but if you're trying (like me) to install it on a new computer running Yosemite, you're in trouble. Anyone have a suggestion as to how to put a working copy of Workbench on a new Yosemite computer?