I recently got my new Macbook air, OS X Yosemite and After Effects doesn't want to start up, and it keeps telling me that "Metadata browser is Missing", among other errors.
I have tried multiple help-pages, tutorials and more without any results.
I've had this difficulty for a while now, but until now it worked fine when I opened it through already existing saves.
Please help, thanks.
What version of AE? What other errors? You need to be more specific. To me it simply sounds like mundane permissions issues, so adjust the user privieleges on your Library folder.