Hey Walter, I installed Yosemite over Mavericks and after 2 days ended up going back to a clean install of Mavericks. Reinstalled all the Adobe stuff, watched it for a day and then upgraded to Yosemite and things are working fine. The Yosemite bug (and what I think was in Mavericks 10.9.5) messes with the Keychain permissions and all that. I’ve had it mess with Google Drive, CC Installer/Updater, Lync and Dropbox. All on my Macbook. No problems with any iMacs I’ve upgraded.