I've only found one reference to the Augmented Maximum for attributes so far in 5th Edition, and that is in the spell description for increased attribute.

Is it still in SR5 and work the same as before?

(I used the search feature in my PDF reader as well to find any instances of augmented maximum just to be sure.)

Page 94: "First, when purchasing augmentations such as cyberware and bioware, each attribute rating (Mental and Physical) can only receive an augmentation bonus of up to +4. If the attribute being raised has not reached its natural maximum limit, the attribute can be raised naturally with Karma; but at no point can augmentations exceed the +4 bonus cap."

Thanks! That's what I was looking for.