Yes. It works just fine. If you see the screenshot I posted above, it shows 2 H90s simultaneously connected via H90 Control. I have actually connected 3 H90s now. Still, no issues.
Thanks for the update. Being able to run H90 Control for each H90 is huge. I did that with the Bluetooth app with my H9s but I find the USB connection to the Mac for H90 Control much more stable.