Dynamic Link usually only works with the same version (the same suite) of the software. You can render your AE assets into a production codec and replace the dynamically linked compositions with the rendered files.
Alternatively, install AE CC (and manually install the required 12.0.1 update to run on Mavericks) and resave the files in your CC version. (This will only work if you have a CC subscription, the update won't work on a trial version. When the 12.1.0 update is released, you will be able to run that trial on Mavericks.)
Thanks alot both options seem like they would work. Never even thought about rendering AE in to production codec will try that first. Would make editing a whole lot easier. Thanks
Would make editing a whole lot easier.
Right. With some workflows it is much better to skip Dynamic Link altogether and just render the AE into a lossless (or nearly lossless) codec.
For others who find this thread in the future, DNxHD and Cineform are both great intermediate codecs as far as being nearly lossless, but with a much smaller file size than a lossless codec.