So, installed or tried to install all 10.11.2 Developer betas up through (15C47a) on my one month old 27" 5k Retina iMac. I won't rehash all the issues even getting them installed. Once installed, my iMac refused to mount one particular WD USB 2.0 drive no matter where I plugged it in.
As an early Xmas present I bought a powered USB 3.0 Hub and two 128GB USB 3.0 sticks. Well. my iMac thinks the hub is actually a USB 2.0 Hub and won't mount the sticks at all.
So, i reinstalled 10.11.1 and now the drive mounts, my iMac knows it's a USB 3.0 Hub and the sticks mount. Gotta love betas. 😁
I posted bug reports about the various issues starting about 3 Weeks ago which are still open. My nightmare is I will be stuck on 10.11.1 forever. 😟
p.s. I NEVER get email notifications for posts here. I do get them from the regular discussions forums. At least I think I know why finally and will see if Apple can fix it.
Just whining mostly.