Something to add to the list of the problems that may happen when setting up your realsense camera with macOS using the the command: $ brew install librealsense.
The Holoplayer has to be connected with the Mac before running the command in terminal.
In the event librealsense was install with out the realsense connected. You would have manually remove the directory listed with the command: $ brew info librealsense
You can remove the directory using the command: $ rm -r [directory location, without brackets]
Once that is done you can run the command: $ brew install librealsense
You may run in the linking issues within brew, just follow the advised command to delete and link the files.
Hope this Helps!