I use Lightroom on a Mac and I use Lightroom on my Laptop ,also a Mac, and I can not open Sony .arw files on the desktop!
This is not Live Chat, it is a forum.
Nevertheless, if you explain your problem in a lot more detail, we probably can help you.
We need to know which camera, what version of Lightroom, and what error message you are getting.
What Sony camera? What version of Lightroom?