New developments for the Bluetooth failure on MacBook Pro models that leaves many customers questioning Apple.
After having the MacBook Pro AirPort Card replaced to purported fix the Bluetooth failure from the update to 10.14.6, the MacBook Pro was tested at the Apple Store with a "Genius Bar" technical representative. The Bluetooth functionality continued in a "failed status" while at the Apple Store. Several Bluetooth devices were used to attempt a full "discovery and connection" of Bluetooth equipment. The failure of "connection" for Bluetooth devices at the Apple Store prompted the Apple Store technician to escalate the issue back to Apple Engineering. Upon returning home with my MacBook Pro, I received a call from the highest level technical phone support representative for the next steps to resolve the Bluetooth issue. The Apple technical call resulted in a "screen sharing" and data capture (packet capture) while using Bluetooth devices during the attempt to discover and connect these devices with the newly installed AirPort Card. There was success in connecting Bluetooth devices; i.e. AirPods, Beats Studios, Magic Mouse. Oddly the devices that were *unable* to connect in the Apple Store were able to connect in my home environment. This suggests there may be a "signal strength" issue with the AirPort Cards in general. The *new* AirPort Card was unable to connect to Bluetooth devices in the Apple Store where there are many WiFi and Bluetooth devices in play, yet the "highest level" technical representative was able to connect the equipment via Bluetooth to the MacBook Pro. Signal strength was discussed and the packet capture should have revealed any problems with Bluetooth.
Where the issue becomes muddy for all of those who have experienced Bluetooth failure upon updating to 10.14.6 is, Apple Engineering continues to claim there is nothing in MacOS 10.14.6 that would cause Bluetooth to fail. This statement is logically contradictory to the many failures in the field where certain hardware (MacBook Pro models) have experienced failure upon installation of MacOS 10.14.6. I'm not convinced Apple Engineering is reporting accurate data, albeit may not have sufficient numbers of failures to confirm there is a problem with 10.14.6.
I have three Mid-2015 MacBook Pro models purchased at or about the same time and currently fully functional, including Bluetooth. My Mid-2015 experienced Bluetooth failure upon updating the MacOS 10.14.6 from 10.14.5. I now have the commitment from Apple that "should I update the other two Mid-2015 MacBook Pro models, Apple will be responsible for their repair. Not ideal, but at lease I have the equipment that should they fail, there shall be a significant indication that MacOS 10.14.6 mysteriously causes Bluetooth failure of the AirPort Card (Bluetooth 4.2).
I've lost some faith in Apple.
