I have the same problem. Lightroom 6, Mac OS10.10, Sony Bluetooth speakers. Did you find a fix?
I thought I had a fix, in that I updated to 6.1 and it worked for a while - but the next time I tried it didn't. Have you found a fix?
Denise, Strange this forum marks my previous reply as the "correct answer" . Sorry I haven't had a reason to try it lately, but am still interested in fixing it. Please post if you find out what the problem is.
This is an odd thing and after replying to you today I got it working again. I only have trouble using my macbook air.
I ticked the box Sync to Music (even though I have tried this before) and it worked.
You might like to try that.
Thanks for the tip. I had the problem on an old white mac book. Haven't tried yet with the more powerful (though old) Mac Pro desktop to see it it works there or not.