This is occuring on 2 machines-- 2008 MacPro with nVidia Quadro 4000 and MacBook Pro Retina with nVidia GT650M
Adobe CC software is up to date.
Since installing OS X 10.9.2 Premiere Pro CC will hang midway through loading plug-ins. Always at a different point. AE CC hangs at Initializing Media Core. This occurs on both machines. After letting it sit for a while to see if the loading will continue, I will Force Quit. Force Quit freezes the computers (both computers) requiring a hard power-down restart. On a few attempts, PPro will actually open but when trying either to open an existing project or creating a new project, the app will hang. Sometimes I can Force Quit without hanging up the system. Other times, I can Force Quit but the PPro UI remains on screen and the system is unstable, requiring either signing out and signing back in as same or different user or a restart.
CUDA version is 5.5.24. I had updated to the CUDA 5.5.48 version for 10.9.2 but that created above symptoms. I have downgraded back to CUDA 5.5.24, restarted, but the problem persists.
I was on chat with an Adobe tech rep who refused to escalate the case unless I hard crashed, rebooted, created a new user with Admin privileges and tried to launch PPro again. Same issues with a new user. But I couldn't restart the chat since I had frozen hard.
Other steps I have tried based upon various forum entries--
Made certain under language prefs that English is main language with United States (Computer) pull down
Removed the Export and Import QT plug ins from the PPro App->Contents->Plug Ins-> Common. That was recommended for CS6. Didn't rebuild those plug ins
Uninstalled PPro with uninstaller and downloaded a new installation from Creative Cloud
Trashed Prefs
Renamed the prefs folder in ~User/Documents/Adobe to OLD to allow to rebuild
Renamed the Library/Application Support/Common/Plug Ins/Media Core/7.0 to 7.0OLD
Created new admin user and launched from that new user
Same behavior on 2 different computers
Appreciate any wisdom from any users or any Adobe folks who might be reading the boards
Ned Soltz