I still have the same problem with my Bose Quiet Comfort 35 and it sucks! They simply just won't stay connected. They only do for 10seconds without audio playback and than disconnect.
I tried deleting the files in /Plug-Ins but these 3 folders are empty and I can't delete this folders themself like the person under me suggested.
I tried deleting the headphones and pair them again
I tried removing the MacBook in my Bose App on my phone
Can somebody from Apple fix this sh** already?!
And yes I am running the latest headphones firmware 3.0.3