We do know connection to multiple H9s is not as robust on Mac as on iOS devices. We’ve heard from our users that there are 2 workarounds. Also please put your H9s as close to your mac as possbile.

 

1. Trash the Bluetooth preferences and restart the Mac:

Go to /Library/Preferences/ and delete ~/Library/Preferences/ByHost

Upon restarting and opening the Bluetooth System Preferences, you will have to wait for the H9 to be recognized and then re-enter the PIN.

 

2. Hold down option-shift and click on the Bluetooth icon in the task bar. You'll now see a "Debug" sub menu. Click "Reset the Bluetooth Module" and then try connecting via the H9 control app.

 

If this doesn't help, you may need to consider using a USB cable to connect to the second H9.