No. BrightSign players are not capable of traditional computer file sharing and thus do not appear on Mac or PC network viewers.
If your player was set up for the BSN.cloud publishing mode, it will be visible under the Network tab in BrightAuthor:connected where various settings can be accessed.
If your player is on the same network as the computer you are using to run BrightAuthor:connected, you can publish to the player directly using the Local Network publishing mode. Alternatively, you can set the player up for the Web Folder publishing mode where content on the player is automatically updated from a designated web folder.
More info on the various publishing modes can be found here.