If you are Apple developer or Apple seed
user, you may have updated to the OS X Yosemite and experience the new feature.
What make you fell disappointed may the wide compatibility issue, for example,
you may find the iMovie, Final Cut Pro works wrongly. Or you may need extra
settings to ignore the problem. Some other issue includes the “The disc you
inserted is nor readable by this computer”, which encountered then you deal
with Blu-ray discs. That means now you can not enjoy Blu-ray disc on your Mac
even with Blu-ray drive and the right Blu-ray Player software like Aurora (works
fine on OS X 10.9).