Just a heads up. This has been covered elsewhere but it reared it's ugly head last night so here goes.
I'm on a MAC PRO. I have waited a long time to upgrade to Yosemite mostly because my DAW of choice wasn't supporting it but now that they released an update and L6 also released their updates, I figured what the hell, let's do this.
So I had already updated the DAW software and had already flashed my pod and installed a model pack and then I pulled the trigger on Yosemite. When it all came back to life, launching Gear Monkey resulted in a bouncing monkey head in my task bar that eventually stopped bouncing and did nothing.
I started searching the forum here…..
One says to completely uninstall and reinstall Monkey
One says to completely uninstall and reinstall an older version of Monkey
One says upgrade java
…. see where this is going?
Finally I came across the REAL answer, so, hopefully this will save some of you from going through the hour if digging that I experienced last night.
Located in my "My Computer\Library\Audio\Plug-Ins\HAL" folder was on old Digidesign CoreAudio.plugin that was for hardware that i haven't had in years. All I had to do was delete that file and restart my machine and everything was back to normal.
If you experience the same issue, I suggest you look in that spot first.