P: Lexar USB 3 card reader not auto recognized on macOS Sierra

Sunil, any news on the fix for this issue, now 6 months ago?

We are aware of this issue and are investigating.
It looks like even the native apps, such as Photos is affected.

Thanks,
Sunil

I have this with every card reader including the built-in one in my MacBook Pro since the upgrade. I always have to select import manually.

I've has issues with the Lexar Professional 32GB UHS-I SDHC card.  I get corruption on some photos occasionally.  I had assumed it was incompatibility with my Olympus E-M1 but perhaps it was Lightroom all along.  In any case I've now switched to SanDisk Ultra SDXC UHS-I with no problems at all.

That's right the Import dialog doesn't open with the thumb nails, I have to manually click the import button

Are you saying the Import dialog in Lightroom isn't opening when you insert your card into a card reader? Or that Lightroom won't launch when you insert the card?