Have you updated your version of CC so it works with Yosemite?
I'm not quite sure what you mean, Dave. To my knowledge I didn't know I had to update CC manually, as all my installed desktop apps say "Up To Date" in the Creative Cloud system menu pop-up. I hope that answers the question, or am I missing other resources for updates?
What, exact, version of AE are you using? That'll let us know better how to help. There have been instances where the Cloud app says everything is updated, but it isn't.
I'm running AfterEffects CC 188.8.131.52.
As well, I am using a fully updated Yosemite 10.10.1.
Curiously, the problem isn't occurring any longer, and it seemed to coincide with fully updating Yosemite. Though...it's hard to say if this did the trick.
I'm still experiencing this issue.
Running osx 10.10.1
After effects 184.108.40.206
Same as above. If I reboot the mac, I get 20mins out of after effects before the layer dragging freezes the app up. I've uninstalled and reinstalled it from the CC panel. Tried various comps with different settings.
note: this also happens when i drag a layer within the comp. Not just dragging assets onto it.
I had this exact same problem. After a while I realized when it would occur. I had an encrypted folder that I kept Google Chrome on. When I had it mounted and Chrome running, that's when I wold have the problem. I know it makes absolutely no sense, but that's what it was. I created a new encrypted folder and put Chrome in thee, and everything's been fine since. Really weird, but it worked.