I have the same problem, took me a whole day to try with include / exclude addons to verify it is oqueue. Im rrunning wow on iMac latest OS X. After Login with any char, some more or less messages from addons appear, on time i had a chat message come in, but then my mouse cursor turn into cyrcle, CPU goes up an i have to close wow manually, otherwise it does not end. Go back to 1.9.5a and everything runs ok.