Owners of the latest MacBook Pros (Late 2013) and Mac Pros (Late 2013) have been reporting dropped streams and freezes when using AirPlay mirroring on an 802.11 b or g WiFi networks (or older AirPort routers).
In a support document Wednesday, Apple suggested there could be some interference from Bluetooth on these Macs and recommended users shut it off when using Airplay.
"Turning off Bluetooth can enhance the performance of Airplay considerably," the company wrote. "To turn off Bluetooth, locate the Bluetooth icon in the menu bar on the upper-right corner of your screen. Click the icon and choose Turn Bluetooth Off."